The flashlight was 20% of the price of the hoodie, so 80 * 20 / 100 = $16. The promotion for a pair of boots was 110 * 10 / 100 = $11. So the pair of boots cost 110 - 11 = $99. Celina therefore spent 80 + 16 + 99 = $195 on the equipment.
The answer: 195
Reverse engineering the question: Celina enjoys hiking in the mountains. Due to a lack of proper equipment, she decided to order a new pair of boots, a flashlight, and a special hoodie. The hoodie cost $80 and the flashlight was only 20% of that price. The pair of boots cost was $110, but due to a special promotion, Celina was able to buy them 10% cheaper. How much did Celina spend in total on the above-mentioned equipment?


Reasoning and answer: In the first 3 hours the pool gets 50 gallons / hour x 3 hours = 150 gallons. With the addition of the other hose, the pool was filling with a rate of 50 gallons / hour + 70 gallons / hour = 120 gallons / hour. In the next 2 hours with both hoses the pool gets 120 gallons / hour x 2 hours = 240 gallons. The pool's total capacity is 240 gallons + 150 gallons = 390 gallons.
The answer: 390
What was the question?
Question: Grace is filling her pool in the backyard with a hose that sprays 50 gallons/hour. She waited for 3 hours but the pool wasn't full, so she decides to add another hose that sprays 70 gallons/hour, and after 2 more hours the pool is full. How much water can Grace’s pool contain?


First find out how many ounces of milk James had to begin with by multiplying the number of gallons by the number of ounces per gallon: 3 gallons * 128 ounces / gallon = 384 oz. Now subtract the 13 ounces James drank from the initial amount of milk: 384 oz - 13 oz = 371 oz.
The answer: 371
Reverse engineering the question: James has 3 gallons of milk. He drank 13 ounces of the milk. If there are 128 ounces in a gallon, how many ounces of milk does James have left?


Reasoning and answer: Billy has already run 6 miles because 1 plus 1 plus 1 plus 1 plus 1 plus plus 1 equals 6. Tiffany has already run 7 miles because 2 plus 2 plus 2 plus 1 / 3 plus 1 / 3 plus 1 / 3 equals 7. Billy has to run 1 mile to tie Tiffany because 7 minus 6 equals 1.
The answer: 1
What was the question?
Question: Billy and Tiffany are having a contest to see how can run the most miles in a week. On Sunday, Monday, and Tuesday, Billy runs 1 mile each day and Tiffany runs 2 miles each day. On Wednesday, Thursday, and Friday, Billy runs 1 mile each day and Tiffany runs a 1/3 of a mile each day. On Saturday Tiffany assumes she's going to win and takes the day off. How many miles does Billy have to run on Saturday to tie Tiffany?


He has 4 * 10 = 40 caterpillars. 40 * .4 = 16 fail to form. That means he has 40 - 16 = 24 butterflies. So he makes 24 * 3 = $72.
The answer: 72
Reverse engineering the question: 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?


Each of Gina's account has $3456 / 4 accounts = $864 / account. Her combined account balance is therefore $864 + $864 = $1728.
The answer: 1728
Reverse engineering the question:
Gina has two bank accounts. Each account has a quarter of the balance in Betty's account. If Betty's account balance is $3,456, what is the combined balance of both Gina's accounts?