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Jim starts with $80 in his investment portfolio. After 1 year it grows by 15%. He then adds another $28 to his portfolio. After 1 more year the combined portfolio grows by 10%. What is his final portfolio worth after 2 years from when he started?

After 1 year Jim has gained $80 * 0.15 = $<<80*0.15=12>>12 Therefore, after 1 year his portfolio has grown to $80 + $12 = $<<80+12=92>>92 He then adds $28 to this total, so his new portfolio total is $92 + $28 = $<<92+28=120>>120 at the beginning of year 2 Next, this total grows by 10%, so he gains $120 * 0.10 = $<<120*0.10=12>>12 across year 2 Thus, after year 2, his portfolio is worth $120 + $12 = $<<120+12=132>>132 #### 132

A cleaning company produces two sanitizer sprays. One spray kills 50% of germs, and another spray kills 25% of germs. However, 5% of the germs they kill are the same ones. What percentage of germs would be left after using both sanitizer sprays together?

After the first spray kills 50% of germs, there will be 100 - 50 = <<100-50=50>>50% left. The second spray kills 25%, but 5% have already been killed by the 50% spray, so it kills 25 - 5 = <<25-5=20>>20%. After the second spray kills 20% of the remaining germs, there will be 50 - 20 = <<50-20=30>>30% left. #### 30

Tommy ordered a total weight of 10 kilograms of apple, orange, grape, and strawberry fruits. He ordered 3 kilograms of apples, 1 kilogram of orange, and 3 kilograms of grapes. How many kilograms of strawberries did he order?

Tommy ordered 3 + 3 + 1 = <<3+3+1=7>>7 kilograms of apples, oranges and grapes altogether. Therefore, Tommy ordered 10 - 7 = <<10-7=3>>3 kilograms of strawberries. #### 3

Louis is making himself a velvet suit for a formal event. The velvet fabric he chose was $24 per yard. He bought a pattern for $15, and two spools of silver thread for $3 each. If he spent $141 for the pattern, thread, and fabric, how many yards of fabric did he buy?

Let V be the number of yards of velvet fabric Louis bought. The silver thread cost 2 * 3 = $<<2*3=6>>6. He spent 24V + 15 + 6 = $141 on the suit. The fabric cost 24V = 141 - 15 - 6 = $120. Thus, Louis bought V = 120 / 24 = <<120/24=5>>5 yards of fabric. #### 5

GiGi took out a big bowl of mushrooms from the refrigerator. She cut each mushroom into 4 pieces. Her twins, Kenny and Karla sprinkled mushrooms on their pizzas and baked them in the oven. Kenny grabbed a handful and sprinkled 38 mushroom pieces on his pizza. Karla scooped them up with both hands and sprinkled 42 mushroom pieces on her pizza. On the cutting board, were 8 pieces of mushrooms remaining. How many mushrooms did GiGi cut up at the beginning?

Kenny used 38 / 4 = <<38/4=9.5>>9.5 mushrooms on his pizza. Karla used 42 / 4 = <<42/4=10.5>>10.5 mushrooms on her pizza. Together, the twins used 9.5 + 10.5 = <<9.5+10.5=20>>20 mushrooms. There are 8 / 4 = <<8/4=2>>2 mushrooms left on the cutting board. GiGi cut up 20 + 2 = <<20+2=22>>22 mushrooms at the beginning. #### 22

The average of marks scored in four tests by Jake was 75. If jake scored 80 marks in the first test and 10 more in the second test, and an equal number of marks in the third and fourth test, calculate the marks he scored in the third test.

Since the average of marks scored in four tests by Jake was 75, the total marks that he scored in the four tests are 4*75 = <<4*75=300>>300 If jake scored 80 marks in the first test and 10 more in the second test, he scored 80+10= <<80+10=90>>90 marks in the second test. The combined marks for the first and the second test is 90+80 = <<90+80=170>>170 The total marks Jake scored in the third and fourth test is 300-170= <<300-170=130>>130 Since Jake scored an equal number of marks in the third and fourth tests, he scored 130/2 =<<130/2=65>>65 marks in each of the third and fourth tests. #### 65

Vincent has 72 inches of rope that he wants to use for a project, but he needs to cut it into smaller pieces first. He cuts it into 12 equal length pieces, but then he realizes it's too short, so he ties three pieces together. The knots then make each piece 1 inch shorter. How long are his pieces of rope after all this?

Each small piece is 6 inches because 72 / 12 = <<72/12=6>>6. Each piece is then 5 inches long after the knots are tied because 6-1=<<5=5>>5 The three pieces tied together are now 15 inches long because 5 x 3 = <<5*3=15>>15 #### 15

Mrs. Carlton gives out penalty points whenever her students misbehave. They get 5 points for interrupting, 10 points for insulting their classmates, and 25 points for throwing things. If they get 100 points, they have to go to the office. Jerry already interrupted twice and insulted his classmates 4 times. How many times can he throw things before he gets sent to the office?

For interrupting, Jerry got 5 points per interruption * 2 interruptions = <<5*2=10>>10 points For insulting, he got 10 points per insult * 4 insults = <<10*4=40>>40 points To get to the 100 limit points, Jerry has 100 points - 10 points - 40 points = <<100-10-40=50>>50 points left He still has 50 points / 25 points per throw = <<50/25=2>>2 throws #### 2

Brenda volunteered to make 3 trays of banana pudding for the family reunion. Each tray of banana pudding would need 80 wafer cookies. A box of wafer cookies only had 60 cookies per box. Each box costs $3.50. How much will it cost her to buy just enough boxes for 3 trays of banana pudding?

Every tray needs 80 cookies and she's making 3 trays so 8*3 = <<80*3=240>>240 Every box of cookies has 60 cookies. She needs 240 cookies so 240/60 = <<240/60=4>>4 boxes The boxes cost $3.50 each and she needs 4 boxes so 3.50*4 = $<<3.50*4=14.00>>14.00 #### 14

Madeline needs $1200 to pay rent, $400 for groceries, $200 for medical expenses, and $60 for utilities. She also wants to save $200 in case of an emergency. She makes $15 per hour at her job. How many hours will Madeline need to work this month?

Madeline needs 1200+400+200+60+200 = $<<1200+400+200+60+200=2060>>2060 to pay all of her bills. She will need to work $2060/$15 per hour = 137.33 hours. She will need to work 138 hours to pay all of her bills #### 138

James's favorite basketball player got paid based on how many points he averaged each week. He gets $10,000 if he averages 30 or more points a game and $8,000 if he averages under 30 points a game. For his last week, in the first game he scored 30 points and in the second game he scored 28 points. In the third game he scored 32 points. In the fourth game he scored 34 points and in the fifth game he scored 26 points. How much does he get paid for the week?

His favorite player scored 150 total points that week because 30 plus 28 plus 32 plus 34 plus 26 equals 150 He averaged 30 points a game because 150 divided by 5 equals <<150/5=30>>30. He gets paid $10,000 because that's how much he gets if he averages 30 or more points that week. #### 10,000

When Matty was born, the cost of a ticket to Mars was $1,000,000. The cost is halved every 10 years. How much will a ticket cost when Matty is 30?

First find the total number of times the cost is halved: 30 years / 10 years/halving = 3 halvings Then halve the cost once: $1,000,000 / 2 = $<<1000000/2=500000>>500,000 Then halve the cost a second time: $500,000 / 2 = $<<500000/2=250000>>250,000 Then halve the cost a third time: $250,000 / 2 = $<<250000/2=125000>>125,000 #### 125000

If the number of dogs in the neighborhood was originally half the number of cats in the neighborhood before twenty new dogs were born, and now there are twice as many dogs as cats, how many cats were in the neighborhood, to begin with, if there are 20 cats now?

Now there are twice as many dogs as cats, and if the number of cats is 20, there are 2*20=<<2*20=40>>40 dogs. Before twenty new ones were born, the number of dogs in the neighborhood originally was 40-20=<<40-20=20>>20 If the number of dogs in the neighborhood was originally half the number of cats in the neighborhood, there were 20*2=<<20*2=40>>40 cats in the neighborhood. #### 40

Dave breaks 2 guitar strings per night when playing live. If he performs 6 shows a week for 12 weeks, how many guitar strings will he need to replace?

He breaks 2 strings a night for 6 nights for a total of 2*6 = <<2*6=12>>12 broken strings He breaks 12 strings per week so over 12 weeks, he will need to replace 12*12 = <<12*12=144>>144 guitar strings #### 144

An electronic shop offers smartphones for $300 each, personal computers for $500 more than smartphones, and advanced tablets for the sum of the prices of a smartphone and personal computer. How much do you have to pay to buy one of each of the three mentioned products?

The price of a personal computer is $300 + $500 = $<<300+500=800>>800. The price of an advanced tablet would be $300 + $800 = $<<300+800=1100>>1100. To buy each of these products, you would have to pay $300 + $800 + $1100 = $<<300+800+1100=2200>>2200. #### 2200

Jim ran 16 miles in 2 hours while Frank ran 20 miles in 2 hours. How many more miles did Frank run than Jim in an hour?

Jim ran 16 / 2 = <<16/2=8>>8 miles for an hour. Frank ran 20 / 2 = <<20/2=10>>10 miles for an hour. Frank ran 10 - 8 = <<10-8=2>>2 more miles than Jim in an hour. #### 2

Ms. Jones got thank you cards from 30% of her class. 1/3 of these contained a gift card for $10. If she got $50 in gift cards, how many students were in her class?

She got 5 gift cards because 50 / 10 = <<50/10=5>>5 She got 15 thank you cards because 5 / (1/3) = <<5/(1/3)=15>>15 She has 50 students because 15 / .3 = <<15/.3=50>>50 #### 50

Juniper, the Irish Setter, has 4 bones. Her master gives her enough bones to double her number of bones. Unfortunately, the neighbor's dog steals away two of Juniper's bones. How many bones does Juniper have remaining?

Doubling 4 bones gives her 4*2=<<4*2=8>>8 bones. The neighbor's dog steals two bones, leaving 8-2=<<8-2=6>>6 bones. #### 6

John sends his son to prep school. It cost $20,000 per semester. There are 2 semesters in the year. How much does it cost to send the kid to 13 years of school?

It cost 20000*2=$<<20000*2=40000>>40,000 a year So it cost 40,000*13=$<<40000*13=520000>>520,000 #### 520,000

Monica made cookies for herself and her family. Her father ate 10 cookies and her mother ate half as much as the father. Her brother ate 2 more than her mother. How many cookies are left for Monica if she made 30 cookies in total?

Monica's mother ate half as many cookies as Monica's father, so she ate 10 cookies / 2 = <<10/2=5>>5 cookies. Monica's brother ate 5 cookies + 2 cookies = <<5+2=7>>7 cookies. There were 30 cookies - 7 cookies - 5 cookies - 10 cookies = <<30-7-5-10=8>>8 cookies left for Monica. #### 8

Matt and Tom both walk up the stairs of the library. Matt goes up the stairs 20 steps per minute. Tom goes up the stairs 5 steps per minute more than Matt. If Matt has reached 220 steps above the entrance, how many steps will Tom have gone up by that time?

Matt would have walked for 220/20=<<220/20=11>>11 minutes. Tom would have gone up by 11*5=<<11*5=55>>55 steps more. Tom would have gone up by 220+55=<<220+55=275>>275 steps. #### 275

Three schools organized a science fair competition and invited students from all the schools to develop ideas and present them before a panel of judges selected by all the schools competing in the science fair. There were 50 students from Know It All High School at the competition, 3/5 times as many students from Karen High as Know It All High School, and twice the combined number of students from the first two schools that came were from Novel Corona High School. Calculate the total number of students at the competition?

If 50 students came from Know It All High School, then Karen High, which had 3/5 times as many students as Know It All High School, had 3/5*50 = 30 students at the fair. The total number of students from Know It All and Karen high schools is 50+30 = <<50+30=80>>80 students. If Novel Corona had twice the combined number of students from Know It All and Karen high schools, then it had 2*80 = <<2*80=160>>160 students at the competition. The total number of students at the competition is 80+160 = <<80+160=240>>240 #### 240

Ben wants to pick 56 sugar snap peas. At his current rate of picking, all will be picked in seven minutes. How long, in minutes, would it take Ben to pick 72 sugar snap peas?

In 1 minute, Ben picks 56/7=<<56/7=8>>8 sugar snap peas. Ben would take 72/8=<<72/8=9>>9 minutes to pick 72 sugar snap peas. #### 9

For every 5 people that attend a poetry class, the teacher gives one of the students a lollipop. If 45 people show up for class, then another 15 come in a while later, how many lollipops did the teacher give away?

The teacher has 45 + 15 = <<45+15=60>>60 people come in total For every 5 people, a lollipop is given away so there are 60 / 5 = <<60/5=12>>12 groups of 5 people and 12 lollipops given away #### 12

Harry is traveling home on the bus. He has already been sat on the bus for 15 minutes, and he knows the rest of the journey will take another 25 minutes. The walk from the bus stop to his house will take half the amount of time the bus journey took. In total, how many minutes will Harry have spent traveling?

The bus journey takes 15 + 25 = <<15+25=40>>40 minutes. The walk from the bus stop to his house will take Harry 40 / 2 = <<40/2=20>>20 minutes. So he will have been traveling for 40 + 20 = <<40+20=60>>60 minutes. #### 60

Henry took 9 pills a day for 14 days. Of these 9 pills, 4 pills cost $1.50 each, and the other pills each cost $5.50 more. How much did he spend in total on the pills?

There were 9-4 = <<9-4=5>>5 other pills Each of the other pills cost 1.50+5.50 = <<1.50+5.50=7>>7 dollars each. The 5 pills cost a total of 7*5 = <<7*5=35>>35 dollars. The first 4 pills cost 1.50*4 = <<1.50*4=6>>6 dollars in total. Henry spent a total of 35+6 = <<35+6=41>>41 dollars. #### 41

Emma got $2000 from the bank. She bought $400 of furniture and gave 3/4 of the rest to her friend Anna. How much is left with Emma?

Emma had $2000 - $400 = $<<2000-400=1600>>1600 left after buying furniture Emma gave Anna 3/4 * $1600 = $<<3/4*1600=1200>>1200 So, Emma is left with $1600 - $1200 = $<<1600-1200=400>>400 #### 400

Tara's parents gave her $90 for her birthday. Not wanting to spend it, Tara put the money in a new bank account that gains 10% interest annually. If she doesn't withdraw the money at all, how much will she have after a year?

In one year, Tara's account will yield an interest of 10/100*90 = <<10/100*90=9>>9 dollars The total in her account will therefore be 90 + 9 = <<90+9=99>>99 dollars. #### 99

Jake sold 10 more stuffed animals than Thor. Quincy sold ten times as many stuffed animals as Thor. If Quincy sold 200 stuffed animals, how many more stuffed animals did Quincy sell than Jake?

Thor sold 200/10=<<200/10=20>>20 stuffed animals. Jake sold 20+10=<<20+10=30>>30 stuffed animals. Quincy sold 200-30= <<200-30=170>>170 more stuffed animals than Jake. #### 170

Katerina purchases 3 pots and 4 pans at the home goods store. Each pot costs $20. The total cost of Katerina's items is $100. If each pan is the same price, what is the cost of 2 pans?

The cost of the pots is 3 * $20 = $<<3*20=60>>60 The cost of 4 pans is $100 - $60 = $40 Since each pan is the same price, the cost of 1 pan is $40 / 4 = $<<40/4=10>>10 The cost of 2 pans is $10 + $10 = $<<10+10=20>>20 #### 20

Renne earns $4000 per month and wants to save half of her monthly earnings to buy the vehicle of her dreams worth $16000. How many months of saving will it take her to buy the vehicle?

If she's saving half her salary every month, she saves 1/2*$4000 = $<<1/2*4000=2000>>2000 every month. If the vehicle is worth $16000, and she saves $2000 every month to buy it, she will have to save for 16000/2000 = <<16000/2000=8>>8 months. #### 8

Alice was able to sell $2500 worth of gadgets. For this month, she expects to receive her monthly basic salary of $240 and a 2% commission from these sales. How much is she going to save this month if she usually saves 10% of her total earnings?

Alice will get $2500 x 2/100 = $<<2500*2/100=50>>50 from her commission. This month, she will receive a total of $240 + $50 = $<<240+50=290>>290. Therefore, Alice will save $290 x 10/100 = $<<290*10/100=29>>29 for this month. #### 29

Emily spent X dollars on Friday, twice that amount on Saturday, and then three times X on Sunday. Over the three days, she spent $120. What is the value of X, in dollars?

She spent X dollars on Friday. She spent 2X dollars on Saturday. She spent 3X dollars on Sunday. X+2X+3X=120 6X=120 X=<<20=20>>20 #### 20

Alex has 2 cakes that are each cut into 8 slices. A fourth of the slices are given away to his friends. A third of the remaining slices are given away to his family. Alex eats 3 slices. How many slices of the cake are left?

There are 2*8 = <<2*8=16>>16 slices of cake. There are 16/4 = <<16/4=4>>4 slices There are 16-4 = <<16-4=12>>12 slices left. There are 12/3 = <<12/3=4>>4 slices given away There are 12-4-3 = <<12-4-3=5>>5 slices of cake left. #### 5

Grant spends $200.00 a year to have the newspaper delivered daily to his house. Juanita buys the newspaper daily. Monday through Saturday, she spends $0.50 and on Sunday she spends $2.00. How much more money does Juanita spend buying the newspaper yearly than Grant?

Monday through Saturday Juanita buys the paper for $0.50 so that's 6*$0.50 = $<<6*0.5=3.00>>3.00 She spends $2.00 for Sunday and $3.00 for the other 6 days so she spends $2 + $3 = $<<2+3=5.00>>5.00 for the newspaper weekly Over 52 weeks she spends 52*$5 = $<<52*5=260.00>>260.00 Juanita spends $260.00 on the newspaper for the year and Grants spends $200.00 a year so Juanita spends $260-$200 = $<<260-200=60.00>>60.00 more #### 60

James has a small tree outside his window with 30 branches with 90 twigs per branch. 30% of the twigs sprout 4 leaves and the rest sprout 5 leaves. How many leaves are on the tree total?

First find the total number of twigs on the tree: 30 branches * 90 twigs/branch = <<30*90=2700>>2700 twigs Then multiply that number by 30% to find how many twigs have 4 leaves: 2700 twigs * 30% = <<2700*30*.01=810>>810 twigs Then subtract that number from the total number of twigs to find how many have 5 leaves: 2700 twigs - 810 twigs = <<2700-810=1890>>1890 twigs Then multiply that number by 5 to find the number of leaves on the 5-leaved twigs: 1890 twigs * 5 leaves/twig = <<1890*5=9450>>9450 leaves Then multiply the number of 4-leaved twigs by 4 to find the total number of leaves they have: 810 twigs * 4 leaves/twig = <<810*4=3240>>3240 leaves Then add the two groups of leaves to find the total number of leaves: 9450 leaves + 3240 leaves = <<9450+3240=12690>>12690 leaves #### 12690

Eric has a chicken farm with 4 chickens. His chickens lay 3 eggs each day. If Eric collects all the eggs after 3 days, then how many eggs will Eric have collected?

Each chicken lays 3 eggs per day and there are 4 chickens 3 * 4 = <<3*4=12>>12 He will collect all the eggs after 3 days 12 * 3 = <<12*3=36>>36 #### 36

Dakota gets hit by a bus and has to spend 3 days in the hospital. The hospital charges her $900/day for her bed, $250/hour for two specialists to look at her 15 minutes each, and $1800 for the ambulance ride. How much is Dakota's medical bill?

First find the total cost of the hospital bed by multiplying the cost per day by the number of days: $900/day * 3 days = $<<900*3=2700>>2700 Then figure out how many minutes total the two specialists looked at Dakota: 15 minutes/specialist * 2 specialists = 30 minutes Then divide the number of minutes by the number of minutes per hour and multiply it by the specialists' hourly rate to find their total charge: 30 minutes / 60 minutes/hour * $250/hour = $<<30/60*250=125>>125 Finally, add up the cost of the specialists, ambulance and bed to find Dakota's total bill: $2700 + $1800 + $125 = $<<2700+1800+125=4625>>4625 #### 4625

Jenny had $24 left after spending 3/7 of her money. How much is half of her original amount of money?

Jenny spent 1 - 3/7 = 4/7 of her money. Since 4/7 is equal to $24, then 1/7 is equal to $24/4 = $6. So, Jenny originally had $6 x 7 = $<<6*7=42>>42. Therefore, half of her original amount of money is $42/2 = $<<42/2=21>>21. #### 21

Brenda picks 250 peaches. When she sorts through them, only 60% are fresh, and Brenda has to throw 15 away for being too small. How many peaches does Brenda have left?

First find how many of the peaches are fresh, which is 250 peaches * 60% = <<250*60*.01=150>>150 peaches. Then, subtract the number Brenda throws away after the fresh count, which is 150 peaches - 15 peaches = <<150-15=135>>135 peaches. #### 135

On a highway, the total number of vehicles passing is 300. If the number of cars on the highway is twice the number of trucks, find out the total number of trucks on the highway?

If we assume that the number of trucks on the highway is t, the number of cars on the highway will be 2*t = 2t The total number of cars and trucks on the road is 2t+t= 300 The number of vehicles on the road is 3t=300 The are t=300/3 trucks on the highway. This means there are t=<<100=100>>100 trucks on the road. #### 100

Krista started raising chickens. She has 10 hens who lay eggs. She sells the eggs for $3 a dozen. In four weeks, she sold $120 worth of eggs. If she sold all the eggs her hens laid, how many eggs does each hen lay a week?

At $3 a dozen, Krista sold $120 / $3 = <<120/3=40>>40 dozen eggs. If 10 hens laid 40 dozen eggs in 4 weeks, that means 40 dozen eggs / 10 hens = <<40/10=4>>4 dozen eggs were laid by each hen in four weeks. To find out how many eggs each hen laid in a week, 4 dozen eggs / 4 weeks = <<4/4=1>>1 dozen eggs each week. Since a dozen has 12 eggs, each hen lays 12*1 = <<12*1=12>>12 eggs each week. #### 12

Katy participated in a summer reading program at her local library. She read 8 books in June, twice as many in July and three fewer in August than she did in July. How many books did Katy read during the summer?

Katy read twice as many books in July as she did in June, so she read 2 * 8 = <<2*8=16>>16 books in July. She read three fewer books in August than she did in July, so she read 16 - 3 = <<16-3=13>>13 books in August. So, including June, she read 8 + 16 + 13 = <<8+16+13=37>>37 books total #### 37

There are 110 calories in a serving of cheese. Rick buys the large blocks that have 16 servings per block. If Rick has already eaten 5 servings of cheese, how many calories are remaining in the block?

The block has 16 servings and he has eaten 5 servings leaving 16-5 = <<16-5=11>>11 servings of cheese There are 11 servings of cheese left and each serving is 110 calories for a total of 11*110 = <<11*110=1210>>1,210 calories #### 1210

The green piece of yarn is 156 cm long. The red yarn is 8 cm more than three times the length of the green yarn. What is the number of centimeters in the total length for the 2 pieces of yarn?

Green = <<156=156>>156 cm Red = 3*156 + 8 = <<3*156+8=476>>476 cm 156 + 476 = <<156+476=632>>632 cm of yarn The two pieces of yarn have a length of 632 centimeters. #### 632

The ratio of boys to girls at the dance was 3:4. There were 60 girls at the dance. The teachers were 20% of the number of boys. How many people were at the dance?

60 girls represent 4 parts, so one part of students is 60 / 4 = <<60/4=15>>15 students. There are 15 * 3 = <<15*3=45>>45 boys at the dance. The teachers at the dance are 45 * 0,2 = 9 teachers at the dance. There are 60 + 45 + 9 = <<60+45+9=114>>114 people at the dance. #### 114

Carla's brush is 12 inches long. If Carmen's brush is 50% longer than Carla's brush, how long is Carmen's brush in centimeters? (There are 2.5 centimeters per inch.)

First find the length of Carmen's brush in inches: 150% * 12 inches = <<150*.01*12=18>>18 inches Then convert the length from inches to centimeters: 18 inches * 2.5 centimeters/inch = <<18*2.5=45>>45 centimeters #### 45

Jenny wants to sell some girl scout cookies and has the choice of two neighborhoods to visit. Neighborhood A has 10 homes which each will buy 2 boxes of cookies. Neighborhood B has 5 homes, each of which will buy 5 boxes of cookies. Assuming each box of cookies costs $2, how much will Jenny make at the better choice of the two neighborhoods?

First, we need to determine which neighborhood is the better choice by comparing the number of boxes sold. A has 10 houses which will buy 2 boxes each, meaning A will give Jenny 10*2=<<10*2=20>>20 box sales Neighborhood B has 5 homes which will each buy 5 boxes, meaning she will sell 5*5=<<5*5=25>>25 boxes by going to that neighborhood. Since 25>20, this means Jenny should choose neighborhood B. Since Jenny earns $2 per box sold, this means she will earn 25*2=<<25*2=50>>50 dollars by choosing neighborhood B. #### 50

Every time Janet folds her blanket its thickness doubles. If it starts out 3 inches thick, how thick will it be after 4 foldings?

First find how thick the blanket will be after 1 folding: 3 inches * 2 = <<3*2=6>>6 inches Then find how thick the blanket will be after 2 foldings: 6 inches * 2 = <<6*2=12>>12 inches Then find how thick the blanket will be after 3 foldings: 12 inches * 2 = <<12*2=24>>24 inches Then find how thick the blanket will be after 4 foldings: 24 inches * 2 = <<24*2=48>>48 inches #### 48

In Henry's collection of music CDs, he has 3 more country CDs than rock CDs but twice as many rock CDs as classical CDs. If he has 23 country CDs, how many classical CDs make up his collection?

Henry has 23-3=<<23-3=20>>20 rock CDs. Henry has 20/2=<<20/2=10>>10 classical CDs. #### 10

At a convention, 16 of 36 delegates arrived with pre-printed name badges. Half of the remaining delegates made their own, hand-written name badges. How many delegates were not wearing name badges?

There were 36-16=<<36-16=20>>20 without pre-printed name badges. Then 20/2=<<20/2=10>>10 made hand-written badges There were 20-10=<<20-10=10>>10 with no name badge. #### 10

Anderson makes mud masks for spa treatments. In every batch of mud that he mixes, he adds three sprigs of mint, and he adds two green tea leaves for every sprig of mint. He had to switch to a different kind of mud, which makes the other ingredients he adds half as effective. How many green tea leaves should Anderson add to a new batch of mud to get the same efficacy as before?

Anderson adds 3 * 2 = <<3*2=6>>6 green tea leaves in every batch of mud. They are half as effective in the new mud, so Anderson should ad 6 * 2 = <<6*2=12>>12 green tea leaves to get the same efficacy as before. #### 12

Mark is filling a punch bowl that can hold 16 gallons of punch. He fills it part way, then his cousin comes along and drinks half the punch in the bowl. Mark starts to refill the bowl and adds 4 more gallons, but then his friend Sally comes in and drinks 2 more gallons of punch. After that, Mark has to add 12 gallons of punch to completely fill the bowl. How much punch did Mark initially add to the bowl?

First, figure out how much punch was left in the bowl before Mark refilled it by subtracting the 12 gallons he added from the bowl's total capacity: 16 - 12 = <<16-12=4>>4 gallons Next, figure out how much punch was in the bowl before Sally came along: 4 + 2 = <<4+2=6>>6 gallons. Next, figure out how much punch was in the bowl before Mark started to refill it: 6 - 4 = <<6-4=2>>2 gallons Finally, multiply that amount by 2 to find out how much punch there was before the cousin drank half: 2 * 2 = <<4=4>>4 gallons #### 4

7 out of 40 people in a cafeteria are wearing checkered shirts. The rest of the people are wearing vertical stripes and horizontal stripes. The number of people wearing horizontal stripes is 4 times as many as the people wearing checkered shirts. How many people are wearing vertical stripes?

40 people - 7 people = <<40-7=33>>33 people are wearing stripes. The number of people wearing horizontal stripes is 4 horizontal stripes/checkered shirt x 7 checkered shirts = <<4*7=28>>28 horizontal stripes The number of people wearing vertical stripes is 33 total stripes - 28 horizontal stripes = <<33-28=5>>5 vertical stripes #### 5

Adam has an orchard. Every day for 30 days he picks 4 apples from his orchard. After a month, Adam has collected all the remaining apples, which were 230. How many apples in total has Adam collected from his orchard?

During 30 days Adam picked 4 * 30 = <<4*30=120>>120 apples. So in total with all the remaining apples, he picked 120 + 230 = <<120+230=350>>350 apples from his orchard. #### 350

There are twenty-two people in a waiting room. If three more people arrive, the number of people in the waiting room becomes five times the number of people inside the interview room. How many people are in the interview room?

There are twenty-two people in a waiting room, and if three more people arrive, the number increases to 22+3=<<22+3=25>>25 If three more people arrive, the number of people in the waiting room becomes five times the number of people that are inside the interview room, meaning there are 25/5=5 people inside the interview room #### 5

Sue and her sister buy a $2,100 car. They agree to split the cost based on the percentage of days use. Sue's sister will drive the car 4 days a week and Sue will get the rest of the days. How much does Sue have to pay?

Sue will drive 7-4=<<7-4=3>>3 days a week So she will pay 2100*3/7=$<<2100*3/7=900>>900 #### 900

At a flea market, Hillary sells handmade crafts for 12 dollars per craft. Today, Hillary sells 3 crafts and is given an extra 7 dollars from an appreciative customer. Later on, Hillary deposits 18 dollars from today's profits into her bank account. How many dollars is Hillary left with after making the deposit?

Hillary sells 3 crafts for 12 dollars each, for a total of 3 crafts * $12/craft = $<<3*12=36>>36 She receives an extra 7 dollars from a customer, increasing the total to $36 + $7 = $<<36+7=43>>43 She then deposits 18 dollars in the bank, leaving her with $43 - $18 = $25 #### 25

Matt orders 15 pounds of beef. He cuts that into 12-ounce steaks. How many steaks does he get?

He buys 15*16=<<15*16=240>>240 ounces of steak That means he buys 240/12=<<240/12=20>>20 steaks #### 20

The cost of Joe's new HVAC system is $20,000. It includes 2 conditioning zones, each with 5 vents. In dollars, what is the cost of the system per vent?

Two zones with 5 vents per zone is 2*5=<<2*5=10>>10 vents. Thus, the $20,000 system costs $20,000/10 = $<<20000/10=2000>>2,000 per vent. #### 2,000

Joan is preparing sandwiches for a family potluck. She decides to make ham sandwiches and grilled cheese sandwiches. One ham sandwich requires 2 slices of cheese, and one grilled cheese sandwich requires 3 slices of cheese. She uses a total of 50 slices of cheese to make the sandwiches. If she makes 10 ham sandwiches, how many grilled cheese sandwiches does she make?

The number of cheese slices used to make the ham sandwiches is 10 * 2 = <<10*2=20>>20 cheese slices. The number of cheese slices used to make the grilled cheese sandwiches is 50 - 20 = <<50-20=30>>30 cheese slices. The number of grilled cheese sandwiches she makes is 30 / 3 = <<30/3=10>>10 grilled cheese sandwiches. #### 10

Jackson buys a computer game for $66 and three movie tickets for $12 each. How much did he spend on entertainment total?

First find the total amount of money Jackson spent on movie tickets: 3 tickets * $12/ticket = $<<3*12=36>>36 Then add the amount he spent on the video game: $36 + $66 = $<<36+66=102>>102 #### 102

Calvin buys a pack of chips, for $0.50, from the vending machine at lunch, 5 days a week. After 4 weeks, how much money has Calvin spent on chips?

The chips cost $0.50 a bag and he buys them 5 days a week so that's .50*5 = $<<0.50*5=2.50>>2.50 a week If he spends $2.50 on chips a week then over 4 weeks he will spend 2.50*4 = $<<2.50*4=10.00>>10.00 on chips #### 10

Rachel is writing an essay. She writes 1 page every 30 minutes. She spends 45 minutes researching the topic. She writes a total of 6 pages. Then she spends 75 minutes editing her essay. Altogether, how many hours did she spend completing the essay?

She spends this long researching and editing her essay 45 min + 75 min = <<45+75=120>>120 min. Converting the minutes to hours for researching and editing is 120 / 60 = <<120/60=2>>2 hours. She spends this long writing the essay 6 x 30 min = <<6*30=180>>180 min. Converting the minutes to hours for writing the essay is 180 / 60 = <<180/60=3>>3 hours. The total hours Rachel spends completing the essay is 2 + 3 = <<2+3=5>>5 hours. #### 5

A box of ice cream bars costs $7.50 and contains three bars. 6 friends want to each eat 2 bars. How much money will that require per person?

If 6 friends each want 2 bars, that's 6 friends * 2 bars = <<6*2=12>>12 bars needed. Each box contains 3 bars, so 12 bars / 3 bars per box = <<12/3=4>>4 boxes needed. A box is $7, so 4 boxes * $7.50 = $<<4*7.5=30>>30. There are 6 friends so $30 / 6 friends = $<<30/6=5>>5 per person. #### 5

Biff is getting ready for a long bus trip. He spends $11 on the ticket, $3 on drinks and snacks, and $16 on a new pair of headphones to listen to music. Biff plans to do online tasks using the bus's WiFi during his trip. If Biff makes $12/hour working online and has to pay $2/hour to access the bus's WiFi, how many hours long will the bus ride need to be for him to break even?

First calculate how much money Biff spent getting ready for the trip: $11 + $3 + $16 = $<<11+3+16=30>>30 Now calculate Bill's net income per hour after he pays for WiFi by subtracting the WiFi cost from his gross hourly rate: $12/hr - $2/hr = $<<12-2=10>>10/hr Finally, divide the money Bill spent by his net hourly rate to find out how many hours he has to work to break even: $30 / $10/hr = <<30/10=3>>3 hours #### 3

Janet pays $40/hour for 3 hours per week of clarinet lessons and $28/hour for 5 hours a week of piano lessons. How much more does she spend on piano lessons than clarinet lessons in a year?

First find the total Janet spends on clarinet lessons per week: $40/hour * 3 hours/week = $<<40*3=120>>120/week Then find the total Janet spends on piano lessons per week: $28/hour * 5 hours/week = $<<28*5=140>>140/week Then subtract her weekly clarinet spending from her weekly piano spending to find the weekly difference: $140/week - $120/week = $<<140-120=20>>20/week Then multiply the weekly difference by the number of weeks in a year to find the annual difference: $20/week * 52 weeks/year = $<<20*52=1040>>1040/year #### 1040

A truck driver has to spend $2 per gallon of gas. She can drive 10 miles per gallon. She drives at a rate of 30 miles per hour. If she is paid $.50 per mile, how much money does she make if she drives for 10 hours?

The truck driver drives for 10 hours at 30 miles per hour, so she drives 10*30=<<10*30=300>>300 miles. Therefore, she needs 300/10=<<300/10=30>>30 gallons of gas. This will cost her 30*$2=$<<30*2=60>>60. She will make 300*$.50= $<<300*.50=150>>150. Thus, after paying for gas, she will make $150-$60=$<<150-60=90>>90. #### 90

Jack and Jill race up the hill to see who gets there fastest. Jack ran up the first half of the hill in 19 seconds. He finished running up the hill 7 seconds before Jill did. If Jill finished the race in 32 seconds, how long did it take Jack to run up the second half of the hill?

Since Jack was faster than Jill, his total running time must have been 32 - 7 = <<32-7=25>>25 seconds. Subtracting the the time he spent running up the first half of the hill shows that it took 25 - 19 = <<25-19=6>>6 seconds to run up the second half of the hill. #### 6

During her first year playing soccer, Tara's dad attended 90% of the games she played. In her second year playing soccer, Tara's dad attended 4 fewer games than he did in the previous year. If Tara played 20 games each year, how many games did Tara's dad attend in her second year playing soccer?

In her first year, Tara's dad attended 20*0.9 = <<20*0.9=18>>18 games. Then, in her second year, Tara's dad attended 18 - 4 = <<18-4=14>>14 games. #### 14

Ignatius owns 4 bicycles. A friend of his owns different types of cycles, which have three times are many tires as Ignatius's bikes have. He has one unicycle, a tricycle, and the rest are bikes. How many bicycles does the friend own?

Ignatius has 8 tires because 2 x 4 = <<2*4=8>>8 His friend has 24 tires because 3 x 8 = <<3*8=24>>24 There are 20 bicycle wheels because 24-1-3 = <<24-1-3=20>>20 He has 10 bicycles because 20 / 2 = <<20/2=10>>10 #### 10

How long is it before Kayla can reach the minimum age of driving of her state, which is 18, if she is currently half the age of her sister Kimiko who is 26 years old?

If Kimiko is 26 years old, Kayla, who is half her age, is 26/2 = <<26/2=13>>13 years old. Sine the minimum driving age is 18, Kayla will have to wait for 18-13 = <<18-13=5>>5 more years to start driving. #### 5

Omar buys a 12-ounce cup of coffee every morning on the way to work. On the way to work, he drinks one-quarter of the cup. When he gets to his office, he drinks another half of the cup. He forgets to drink any more of his coffee once he starts working, and when he remembers his coffee, he only drinks 1 ounce of the remaining amount because it is cold. How many ounces will be left in the cup afterward?

Omar drinks 1/4 * 12 = 12/4 = <<12/4=3>>3 ounces on the way to work. Omar drinks 1/2 * 12 = 12/2 = <<12/2=6>>6 ounces when he gets to his office. When he drinks 1 ounce more, he will have drunk 3 + 6 + 1 = <<3+6+1=10>>10 ounces. Thus, there will be 12 - 10 = <<12-10=2>>2 ounces left in the cup afterward. #### 2

In a court-mandated traffic class, there are a certain number of drunk drivers and 3 less than 7 times that many speeders. If there are 45 students total, how many drunk drivers are there?

Let d be the number of drunk drivers and s be the number of speeders. We know that d + s = 45 and s = 7d - 3. Substituting the second equation into the first equation, we get d + 7d - 3 = 45 Combining like terms, we get 8d - 3 = 45 Adding 4 to both sides, we get 8d = 48 Dividing both sides by 8, we get d = 6 #### 6

A cobbler can mend 3 pairs of shoes in an hour. From Monday to Thursday, the cobbler works for 8 hours each day, and on Friday, he only works from 8am to 11am. How many pairs of shoes can the cobbler mend in a week?

From Monday to Thursday, the cobbler can mend 3 x 8 = <<3*8=24>>24 pairs of shoes a day. From Monday to Thursday, he can mend 24 x 4 = <<24*4=96>>96 pairs of shoes. On Friday, he works for 11 - 8 = <<11-8=3>>3 hours. On Friday, he can mend 3 x 3 = <<3*3=9>>9 pairs of shoes. In a week, he can mend 96 + 9 = <<96+9=105>>105 pairs of shoes. #### 105

If Billy sleeps 6 hours one night, then 2 more hours than that the following night, and then half the previous amount the following night, and then finally triple the previous amount the final night, how much did he sleep in that four day period?

Billy slept 6 hours the first night. He then slept 6+2=<<6+2=8>>8 hours the second night. Billy then slept 8/2=<<8/2=4>>4 hours the third night. Finally, Billy slept 4*3=<<4*3=12>>12 hours the fourth night. In total, Billy slept 6+8+4+12=<<6+8+4+12=30>>30 hours. #### 30

A bird eats 7 berries a day. Samuel has 5 birds. How many berries do Samuel's birds eat in 4 days?

A bird eats 7 x 4 = <<7*4=28>>28 berries in 4 days. So, 5 birds can eat 28 x 5 = <<28*5=140>>140 berries in 4 days. #### 140

Timmy plans to ride a skateboard ramp that is 50 feet high. He knows he needs to go 40 mph at the start to make it all the way to the top. He measures his speed on three trial runs and goes 36, 34, and 38 mph. How much faster does he have to go than his average speed to make it up the ramp?

His total speed from the trials is 108 because 36 + 34 + 38 = <<36+34+38=108>>108 His average speed was 36 mph because 108 / 3 = <<108/3=36>>36 He needs to go 4 mph faster to make it to the top because 40 - 36 = <<40-36=4>>4. #### 4

James has 3 more than 2 times the number of Oreos Jordan has. If there are 36 Oreos total, how many does Jordan have?

Let x represent the number of Oreos Jordan has James:3+2x Oreos Total:3+2x+x=36 3x+3=36 3x=33 x=<<11=11>>11 Oreos #### 11

Paul earns $12.50 for each hour that he works. He then has to pay 20% for taxes and fees. After working 40 hours, Paul receives his paycheck. If he spends 15% of his paycheck on gummy bears, how much, in dollars, does he have left?

His pay before taxes and fees is $12.50 x 40 hours = $<<12.5*40=500>>500. He pays $500 * 0.20 = $<<500*0.20=100>>100 for taxes and fees. Then he had $500 - $100 = $<<500-100=400>>400 remaining money. He takes out $400 * 0.15 = $<<400*0.15=60>>60 for his gummy bears. So he's left with $400 - $60 = $<<400-60=340>>340. #### 340

Stephen has 110 ants in his ant farm. Half of the ants are worker ants, 20 percent of the worker ants are male. How many female worker ants are there?

Worker ants:110/2=<<110/2=55>>55 ants Male worker ants:55(.20)=11 Female worker ants:55-11=<<55-11=44>>44 ants #### 44

Pat is hunting for sharks to take photos. For every photo he takes he earns $15. He sees a shark about every 10 minutes. His boat fuel costs $50 an hour. If he shark hunts for 5 hours, how much money can he expect to make in profit?

He will use $250 in fuel because 5 x 50 = <<5*50=250>>250 He will be shark hunting for 300 minutes because 5 x 60 = <<5*60=300>>300 He can expect to see 30 sharks because 300 / 10 = <<300/10=30>>30 He will make $450 off these photos because 30 x 15 = <<30*15=450>>450 He will make $200 in profit because 450 - 250 = <<450-250=200>>200 #### 200

Javier plays 2 baseball games a week. In each of his first 20 games, he averaged 2 hits. If he has 10 games left, how many hits a game does he have to average to bring his average for the season up to 3 hits a game?

There are thirty games in the season because 20 + 10 = <<20+10=30>>30 He needs to get 90 hits on the year to average 3 hits a game because 30 x 3 = <<90=90>>90 He has 40 hits already because 20 x 2 = <<20*2=40>>40 He needs 50 hits in the final 10 games because 90 - 40 = <<90-40=50>>50 He needs to average 5 hits a game because 50 / 10 = <<50/10=5>>5 #### 5

Lexie is 6 years older than her brother and her sister is twice her age. If Lexie is 8, what is the age difference between her brother and her sister?

Lexie's brother is 8 - 6 = <<8-6=2>>2 years old. Her sister is 8 x 2 = <<8*2=16>>16 years old. The age difference between her brother and sister is 16 - 2 = <<16-2=14>>14 years. #### 14

On a farm, on average every 6 cows produce 108 liters of milk per week. In five weeks the cows produced 2160 liters of milk. How many cows are on the farm?

Per week, one cow produces 108 liters / 6 cows = <<108/6=18>>18 liters/cow. The cows produced 2160 liters of milk over 5 weeks. So we have 2160 liters / 18 liters/cow = <<2160/18=120>>120 cows. Further, we have to divide 120 cows / 5 weeks = <<120/5=24>>24 cows. #### 24

John decides to get a new phone number and it ends up being a recycled number. He used to get 20 text messages a day. Now he is getting 55. Assuming the number of texts his friends send has not changed, how many text messages per week is he getting that are not intended for him?

He is getting an extra 55-20=<<55-20=35>>35 text messages per day So he is getting an extra 35*7=<<35*7=245>>245 text messages per week #### 245

Last year, Peter organized a Fun Run for his community project and 200 people signed up. Forty people did not show up to run. This year, there will be twice as many runners as last year. How many people will run this year?

There were 200 - 40 = <<200-40=160>>160 runners last year. Therefore, there will be 2 x 160 = <<2*160=320>>320 runners this year. #### 320

The stadium seats 60,000 fans, but only 75% of the seats were sold for the music show. Because of the threat of rain, 5,000 fans stayed home. How many attended the show?

The number of seats sold was 0.75*60,000=<<0.75*60000=45000>>45,000. And 45,000-5,000=<<45000-5000=40000>>40,000. #### 40,000

Chad is hosting a BBQ on the hottest day of the year, where there will be a total of 15 people. He will need 2 pounds of ice per person to account for the heat. One pound bags of ice are sold for $3.00 for a pack of 10. How much will he spend on ice?

He’s inviting 15 guests and will need 2 pounds per person so he will need 15*2 = <<15*2=30>>30 pounds of ice Ice is sold in 10-pound bags and he needs 30 pounds so he will need 30/10 = <<30/10=3>>3 bags of ice Each bag is $3.00 and he needs 3 bags so they will cost 3*3 = $<<3*3=9.00>>9.00 #### 9

Daisy's Flower Shop sold 45 daisies on its first day. On their second day, they sold 20 more flowers than they did on their first day. On the third day, they sold 10 less than twice the flowers that were sold than on the second day. If the flower shop sold a total of 350 daisies for 4 days, how many daisies were sold on the 4th day?

The flower shop sold 45 + 20 = <<45+20=65>>65 daisies on the second day. Twice the number of flowers on the second day is 65 x 2 = <<65*2=130>>130. So, the flower shop sold 130 - 10 = <<130-10=120>>120 daisies on the third day. The total daisies sold for 3 days was 45 + 65 + 120 = <<45+65+120=230>>230. Therefore, 350 - 230 = <<350-230=120>>120 daisies were sold on the 4th day. #### 120

The file, 90 megabytes in size, downloads at the rate of 5 megabytes per second for its first 60 megabytes, and then 10 megabytes per second thereafter. How long, in seconds, does it take to download entirely?

The first 60 megabytes take 60/5=<<60/5=12>>12 seconds. There are 90-60=<<90-60=30>>30 remaining megabytes. The remaining 30 megabytes take 30/10=<<30/10=3>>3 seconds. And 12+3=<<12+3=15>>15 seconds. #### 15

Last year, Jorge planted corn on all of his 60 acres of property. Typically, corn grown on good soil yields 400 bushels per acre, but in clay-rich soil, the yield is only half as much per acre as in good soil. One-third of Jorge's 60 acres of land is clay-rich soil and the rest is good soil. How many bushels of corn did Jorge's land yield last year?

Jorge has 60 * (1/3) = <<60*(1/3)=20>>20 acres of clay-rich soil. He has 60 - 20 = <<60-20=40>>40 acres of good soil. At 400 bushels per acre, his 40 acres of good soil produced 40 * 400 = <<400*40=16000>>16,000 bushels of corn. If good soil produces 400 bushels per acre, clay-rich soil produces 400 / 2 = <<400/2=200>>200 bushels per acre. At 200 bushels per acre, his 20 acres of clay-rich soil produced 20 * 200 = <<200*20=4000>>4,000 bushels of corn. Altogether, his land produced 16,000 + 4,000 = <<16000+4000=20000>>20,000 bushels of corn. #### 20000

John raises butterflies. He has 4 jars of 10 caterpillars each. 40% of them fail to become butterflies, but the rest become caterpillars. He sells the butterflies for $3 each. How much money does he make?

He has 4*10=<<4*10=40>>40 caterpillars. 40*.4=<<40*.4=16>>16 fail to form. That means he has 40-16=<<40-16=24>>24 butterflies. So he makes 24*3=$<<24*3=72>>72. #### 72

Carla, Kyle, and Tasha caught 36 fish. If Kyle and Tasha caught the same number of fish and Carla caught 8, how many fish did Kyle catch?

Kyle and Tasha caught 36 - 8 = <<36-8=28>>28 fish Kyle caught 28/2 = <<28/2=14>>14 fish #### 14

In a classroom, 10 children have 7 books each. Their teacher brings another 8 books to the classroom. How many books are in the classroom altogether?

At first, the children have 10*7=<<10*7=70>>70 books With their teacher, they have 70+8=<<70+8=78>>78 books #### 78

A basketball team won 40 games in their last competition. In the next competition, they won 5/8 times as many games as they won in their first competition. In the third competition, they won the same number of games as the sum of the first and second competition winnings. Calculate the total number of wins they had in the three competitions.

If they won 40 games in the first competition, they won 5/8*40 = <<5/8*40=25>>25 games in their second season. In the third competition, they won games equal to the sum of the games they won in the last two competitions, which is 25+40 = <<25+40=65>>65 games. Since the total number of games they won in the first two competitions is 65, and they won 65 more in the third competition, they won a total of 65+65 = <<65+65=130>>130 in all competitions. #### 130

Wayne wants to serve shrimp cocktail as an appetizer. He plans on 5 shrimp per guest and will have 40 guests. If the shrimp costs $17.00 per pound and each pound has 20 shrimp, how much will he spend on the appetizer?

He wants to serve 5 shrimp per guest and will have 40 guests so he needs 5*40 = <<5*40=200>>200 shrimp Each pound of shrimp has 20 shrimp and he needs 200 shrimp so he needs 200/20 = <<200/20=10>>10 pounds of shrimp The shrimp is $17.00 per pound and he needs 10 pounds so he will spend 17*10 = $<<17*10=170.00>>170.00 on shrimp #### 170

In 5 years, Andy will be twice as old as Rahim is now. Rahim is 6 now. How much older is Andy than Rahim, right now, in years?

Andy will be 2*6=<<2*6=12>>12. Now he is 12-5=<<12-5=7>>7. So Andy is 7-6=<<7-6=1>>1 year older than Rahim. #### 1

On an American flag, the first stripe is red and half of the remaining stripes are also red. Each flag has 13 stripes. John buys 10 flags. How many red stripes are there?

There are 13-1=<<13-1=12>>12 stripes left So there are 12/2=<<12/2=6>>6 red stripes So the total number of red stripes is 6+1=<<6+1=7>>7 red stripes So he has a total of 7*10=<<7*10=70>>70 red stripes #### 70

Joy has 30 pencils, and Colleen has 50 pencils. If they bought the pencils at $4 each at the store, how much more money did Colleen pay than Joy for her pencils?

The number of pencils that Colleen has more than Joy is 50-30 = <<50-30=20>>20 pencils. If each pencil was sold at $4 each, Colleen paid $4*20 = $<<4*20=80>>80 more for the 20 extra pencils she has more than Joy. #### 80