Andrew's family consists of 1 + 2 + 2 = 5 people. Each of Andrew's family members uses 100 masks / 5 = 20 masks. With everyone wearing a mask every 4 days, the masks will last 20 masks * 4 days / mask = 80 days.
The answer: 80
Reverse engineering the question: Andrew's father buys a package of 100 masks. Andrew lives with his 2 parents and 2 siblings. All members of Andrew's family change masks every 4 days. How many days will it take to finish the pack of masks?


Reasoning and answer: If Coraline has the number 80, Jayden, whose number is 40 less than that of Coraline, has 80 - 40 = 40. Together, Jayden and Coraline's numbers total 80 + 40 = 120. Mickey's number is greater than Jayden's number by exactly 20, meaning his number is 40 + 20 = 60. The total of the numbers the three have is 120 + 60 = 180.
The answer: 180
What was the question?
Question: Mickey's number is greater than Jayden's number by exactly 20. If Jayden's number is 40 less than Coraline's number, and Coraline's number is 80, calculate the total of the numbers they have.


First find the total number of flutes who were accepted: 20 flutes * .8 = 16 flutes. Then find the total number of clarinets who were accepted: 30 clarinets * .5 = 15 clarinets. Then find the total number of trumpets who were accepted: 60 trumpets * 1 / 3 = 20 trumpets. Then find the total number of pianists who were accepted: 20 pianists * 1 / 10 = 2 pianists. Then add the number of each kind of instrument to find the total number of people in the band: 16 flutes + 15 clarinets + 20 trumpets + 2 pianists = 53 people.
The answer: 53
Reverse engineering the question: Mary just held tryouts for the high school band. 80% of the 20 flutes got in, half the 30 clarinets got in, 1/3 of the 60 trumpets got in, and 1/10th of the 20 pianists got in. How many people are in the band total?


Reasoning and answer: Bob has 5 rows of corn, each with 80 corn stalks, so he has 5 rows * 80 stalks per row = 400 corn stalks. 8 corn stalks will produce a bushel of corn, so Bob will harvest 400 corn stalks / 8 corn stalks per bushel = 50 bushels of corn.
The answer: 50
What was the question?
Question: Bob grew corn in his garden and is ready to harvest it. He has 5 rows of corn, and each row has 80 corn stalks. About every 8 corn stalks will produce a bushel of corn. How many bushels of corn will Bob harvest?


Uncle Ben has 440 chickens - 39 roosters = 401 hens. Uncle Ben has 401 hens - 15 that don't lay eggs = 386 hens that lay eggs. The egg - laying hens each lay 3 eggs * 386 hens = 1158 eggs.
The answer: 1158
Reverse engineering the question: Uncle Ben has 440 chickens on his farm. 39 are roosters and the rest are hens. 15 of his hens do not lay eggs, and the rest do. If each egg-laying hen lays 3 eggs, how many eggs will Uncle Ben have?


He needs 500 / 50 = 10 bags of flour. That cost 20 * 10 = $200. He needs 10 * .2 = $2 worth of salt. So everything cost 1000 + 200 + 2 = $1202. He makes 20 * 500 = $10,000 selling tickets. So he makes a profit of 10000 - 1202 = $8798.
The answer: 8798
Reverse engineering the question:
Tom wants to make the world's largest dough ball. He needs 500 pounds of flour and he can buy 50-pound bags of flour for $20. He also needs 10 pounds of salt and salt cost $.2 a pound. He also spends $1000 promoting everything. He then sells tickets for $20 each and sells 500 tickets. How much money did he make?