Rob hunts 1 / 2 * 6 animals / day = 3 animals / day. Rob and Sam hunt 3 animals / day + 6 animals / day = 9 animals / day. Mark hunts 1 / 3 * 9 animals / day = 3 animals in a day. Peter hunts 3 * 3 animals / day = 9 animals in a day. The total they all hunt in a day is 6 animals / day + 3 animals / day + 3 animals / day + 9 animals / day = 21 animals.
The answer: 21
Reverse engineering the question: In a day, Sam hunts 6 animals. Rob hunts half as many animals as Sam. Mark hunts 1/3 of the total of what Rob and Sam hunt. If Peter hunts 3 times as many animals as Mark does, how many animals do they all hunt in a day?


Reasoning and answer: Liza got 60 x 90 / 100 = 54 of the items correctly. So, Rose got 54 + 2 = 56 of the items correctly. Thus, Rose had 60 - 56 = 4 incorrect answers.
The answer: 4
What was the question?
Question: In a 60-item exam, Liza got 90% of the items correctly. Her best friend, Rose, got 2 more correct answers than her. How many incorrect answers did Rose have?


Four tires cost $42 x 4 = $168. So, the price of the battery is $224 - $168 = $56.
The answer: 56
Reverse engineering the question: Four tires and one battery together cost $224. Each tire costs $42. Calculate the price of the battery.


Reasoning and answer: If Rick bought 30 guppies, Tim bought 2 clowns / guppy * 30 guppies = 60 clowns. The total number of tetras bought by you is 4 tetras / clown * 60 clowns = 240 tetras. In total, the three bought 240 tetras + 60 clowns + 30 guppies = 330 animals.
The answer: 330
What was the question?
Question: On our last vacation, I bought 4 times as many tetras as Tim bought clowns. Tim bought twice as many clowns as Rick bought guppies. If Rick bought 30 guppies, how many animals did we buy on our last vacation?


Night 1:30 pages. Night 2:2(30) - 2 = 58 pages. Night 3:3 + (30 + 58) = 91 pages. Total:30 + 58 + 91 = 179 pages.
The answer: 179
Reverse engineering the question: Coral reads 30 pages of a book on night 1, and 2 less than twice that on night 2. Night 3 Coral reads 3 more pages than the sum of the first two nights. How many total pages did Coral read in the 3 nights?


The total square footage from the three bedrooms is 3 * 400 = 1200 square feet. The total square footage of the house is 1200 + 600 = 1800 square feet. Henrietta needs 1800 / 600 = 3 gallons of paint.
The answer: 3
Reverse engineering the question:
Henrietta is repainting her house. The walls in the living room take up 600 square feet. She has three bedrooms. The walls in each bedroom take up 400 square feet. If one gallon of paint can cover 600 square feet, how many gallons of paint does Henrietta need to paint her house?