Reasoning and answer: If for every $100 spent I save $10, then for $250 spend I'd save $10 * 2 = $20. If my total was $250, then I ended up paying $250 - $20 = $230.
The answer: 230
What was the question?
Question: There's an online sale where you get $10 for every $100 that you spend. If you make a purchase of $250 before discounts, how much did you end up paying?
He keeps 100 / 2 = 50 tennis balls. So 50 / 5 = 10 go in each container.
The answer: 10
Reverse engineering the question: James buys 100 tennis balls and gives half of them away. The other half he puts into 5 large containers. How many tennis balls go in each container?
Reasoning and answer: Of the males with stripes, 40% are babies because 100 - 60 = 40. There are 10 males with stripes because 4 / .4 = 10. There are 40 males because 10 / (1 / 4) = 40. Males make up 40% of the pond's total, because 100 - 60 = 40. There are 100 turtles in total 40 / .4 = 100.
The answer: 100
What was the question?
Question: Tiffany is looking at a lake full of turtles. The turtles are 60% female and the rest are male. Of the males, 1 in 4 has stripes. Of the ones with stripes, 4 are babies, while 60% are adults How many turtles are in the lake?
Carrie can do 2 * 45 = 90 sit - ups per minute. Jerrie can do 90 + 5 = 95 sit - ups per minute. In two minutes, Carrie would perform 90 * 2 - 180 sit - ups. And in three minutes, Jerrie would perform 3 * 95 = 285 sit - ups. Thus, in the scenario described, in total, the three would perform 45 + 180 + 285 = 510 sit - ups.
The answer: 510
Reverse engineering the question: Barney can perform 45 sit-ups in one minute. Carrie can do twice as many sit-ups per minute as Barney can. And Jerrie can do 5 more sit-ups per minute than Carrie can do. If Barney does sit-ups for 1 minute, and Carrie does sit-ups for two minutes, and Jerrie does sit-ups for three minutes, what would be the combined total number of sit-ups performed?
Reasoning and answer: From Monday to Friday, Ralph watches TV for 4 * 5 = 20 hours. On Saturday and Sunday, Ralph watches TV for 2 * 6 = 12 hours. In one week, Ralph watches TV for a total of 20 + 12 = 32 hours.
The answer: 32
What was the question?
Question: Ralph watches TV for 4 hours a day from Monday to Friday, and 6 hours a day on Saturday and Sunday. How many hours does Ralph spend watching TV in one week?
Reasoning and answer: Jessica will drive 20 minutes, twice every school day (to and from school), so 20 minutes x 2 trips = 40 minutes each day. There are 60 minutes in 1 hour, so 50 hours of driving x 60 minutes / hour = 3,000 minutes. If you take the 3,000 minutes she needs to drive / 40 minutes driving each day = 75 school days to drive 50 hours.
The answer: 75
What was the question?
Question:
Jessica just got her driving permit. She must complete 50 hours of driving with a parent to get her driver's license. It takes 20 minutes to drive to school. If she drives to and from school every day, how many school days will it take Jessica to meet the 50-hour driving requirement?