After his father gave him 13 biscuits, Randy has 32 + 13 = 45 biscuits. After his mother gave him 15 biscuits, Randy has 45 + 15 = 60 biscuits. After his brother ate 20 of the biscuits. Randy has 60 – 20 = 40 biscuits.
The answer: 40
Reverse engineering the question: Randy had 32 biscuits. His father gave him 13 biscuits as a gift. His mother gave him 15 biscuits. Randy’s brother ate 20 of these biscuits. How many biscuits are Randy left with?


Reasoning and answer: They both finished reading a total of 34 + 32 = 66 books. Therefore, they still have to read a total of 89 – 66 = 23 books.
The answer: 23
What was the question?
Question: Mcgregor and Floyd were assigned 89 books to read for the week. If Mcgregor was able to finish 34 while Floyd was able to finish 32, how many books do they still have to read?


First, calculate how many square feet of road Mark needs to cover by multiplying the length by the width: 2000 feet * 20 feet = 40,000 sq ft. Then divide the square footage of road by the number of square feet each truckload will cover: 40,000 sq ft / 800 sq ft / truckload = 50 truckloads. Now multiply the number of truckloads by the cost per truckload: $75 / truckload * 50 truckloads = $3750. Now calculate the sales tax by multiplying $3750 by 20%: $3750 * .2 = $750. Now add the sales tax to the cost of the asphalt to find the total: $750 + $3750 = $4500.
The answer: 4500
Reverse engineering the question: Mark is buying asphalt to pave a new section of road. The road will be 2000 feet long and 20 feet wide. Each truckload of asphalt will cover 800 square feet of road. If each truckload costs $75, and there's a 20% sales tax, how much will Mark need to pay for asphalt?


Reasoning and answer: Marge used half the $12006 for taxes, so she had 12006 / 2 = $6003 left. She used 1 / 3 of the leftover money on student loans, so she paid 6003 / 3 = $2001. After paying the student loans, she had 6003 - 2001 = $4002 left. She put $1000 in savings, so she had 4002 - 1000 = $3002 left. She invested 1000 / 5 = $200 in the stock market. After investing, she had 3002 - 200 = $2802 left for fun.
The answer: 2802
What was the question?
Question: Marge had a winning lottery ticket for $12006 and wanted to spend some of it wisely before using on any fun things. She paid half of the lottery amount for the taxes on her winnings, then put a third of the leftover money towards her student loans. She put $1000 in savings and invested a fifth of that amount in the stock market. How many dollars does she have left for fun?


Across Saturday and Sunday, Sally eats 2 + 1 = 3 sandwiches. Since each sandwich sues 2 pieces of bread, Sally eats 3 * 2 = 6 pieces of bread.
The answer: 6
Reverse engineering the question: Sally eats 2 sandwiches on Saturday and 1 sandwich on Sunday. If each sandwich uses 2 pieces of bread, how many pieces of bread does Sally eat across Saturday and Sunday?


The bed cost 75 * 10 = $750. So everything cost 750 + 75 = $825. He gets 825 * .2 = $165 off. So that means he pays 825 - 165 = $660.
The answer: 660
Reverse engineering the question:
James decides to buy a new bed and bed frame. The bed frame is $75 and the bed is 10 times that price. He gets a deal for 20% off. How much does he pay for everything?