The pens and pencils were $1.00 each so 2 * 1 = $2.00. The back pack cost $15 and the pens / pencils cost $2.00 so 15 + 2 = $17.00. His total spent was $32 and he has already spend $17 so 32 - 17 = $15.00. That means he has $15 left to spend on 5 notebooks so the cost would be 15 / 5 = $3.00 each.
The answer: 3
Reverse engineering the question: Dan spent $32 buying a new backpack, 1 pack of pens, 1 pack of pencils and 5 multi-subject notebooks for school. If the backpack costs $15 and both the pens and pencils cost $1.00 each, how much did each notebook cost?
Reasoning and answer: Let's use p for the number of feet in Mark's pond. 3 * p + 4 = 19. 3 * p = 19 - 4 = 15. 3p = 15. p = 5.
The answer: 5
What was the question?
Question: Mark and Peter dug ponds in their backyards. Mark's pond is 4 feet deeper than 3 times Peter's pond. If Mark's pond is 19 feet deep, what is the depth of Peter's pond?
The vet made 8 * 15 = $120 in dog vet fees. The vet made 3 * 13 = $39 in cat vet fees. The total vet fees were 120 + 39 = $159. The vet donated 1 / 3 of the fees, so they donated 159 / 3 = $53 back to the shelter.
The answer: 53
Reverse engineering the question: An animal shelter is having a pet adoption event where owners can adopt an animal for just the cost of the vet fees. Vet fees for dogs are $15, and vet fees for cats are $13. Eight families adopt dogs and three adopt cats. The vet donates a third of the fees they were paid for the adoption checkups back to the shelter. How many dollars did the vet donate?
Reasoning and answer: Megan started with $125 and increased it by 25%, so $125 + (0.25)125 or $125 + $31.25 = $156.25. Then the balance decreased by 20%, so $156.25 (0.20)156.25 or $156.25 - $31.25 = $125. $125 is the balance Megan started with, so her final balance is 100% of the starting balance.
The answer: 100
What was the question?
Question: Megan's grandma gave her $125 to start a savings account. She was able to increase the account by 25% from funds she earned babysitting. Then it decreased by 20% when she bought a new pair of shoes. Her final balance is what percentage of her starting balance?
On Friday the restaurant had 73 customers for breakfast + 127 customers for lunch + 87 customers for dinner = 287 customers total on Friday. If they predict getting 2x the amount of customers on Saturday as on Friday, they will have 287 customers x 2 = 574 customers on Saturday.
The answer: 574
Reverse engineering the question: A busy restaurant is counting how many customers they had during that Friday to try to predict how many they might get on Saturday. During breakfast, they had 73 customers. During lunch, they had 127 customers. During dinner, they had 87 customers. If they predict they'll get twice the amount of customers on Saturday as they had on Friday, how many customers do they predict they will get?
First, find the price of the sandwiches $5 per sandwich * 18 sandwiches = $90. Now add in the delivery fee $90 + $20 = $110. Now the tip $110 * 0.10 = $11. Add the tip to the price of the sandwiches $110 + $11 = $121 in total.
The answer: 121
Reverse engineering the question:
Preston has a sandwich shop. He charges $5 for each sandwich. He also charges $20 for a delivery fee. Abra Company orders 18 sandwiches from Preston and also tips him 10%. How much total, in dollars, did Preston receive?