He buys 4 * 30 = 120 stickers. That means it cost 120 * .1 = $12. So he pays 12 * .5 = $6.
The answer: 6
Reverse engineering the question: James splits 4 packs of stickers that have 30 stickers each. Each sticker cost $.10. If his friend pays for half how much did James pay?


Reasoning and answer: There were a total of 50 + 54 = 104 ice creams. There were 50 x 3 / 5 = 30 chocolate - flavored ice creams sold. There were 54 x 2 / 3 = 36 mango - flavored ice creams sold. A total of 30 + 36 = 66 ice creams were sold. So, 104 - 66 = 38 ice creams were not sold.
The answer: 38
What was the question?
Question: An ice cream vendor has 50 chocolate-flavored ice creams and 54 mango-flavored ice creams in his cart. If he sold 3/5 of the chocolate-flavored ice creams and 2/3 of the mango-flavored ice creams, how many total ice creams were not sold?


Let’s set up an equation by calling the lifespan of a bat x, and therefore the lifespan of the hamster x – 6, and the lifespan of the frog 4 (x – 6) which add together to equal 30, like this: x + x – 6 + 4 (x – 6) = 30. That gives us 6x – 30 = 30 and we should add 30 to each side to try to isolate the x. Now we have 6x = 60, which we will divide by 6, 6x / 6 = 60 / 6. This gives us x = 10. The bat has a lifespan of 10 years.
The answer: 10
Reverse engineering the question: The lifespan of a hamster is 6 years less than that of a bat. The lifespan of a frog is 4 times that of a hamster. Altogether, the lifespan of the animals is 30 years. What is the lifespan of the bat?


Reasoning and answer: Half the number of shows is 10 / 2 = 5 seasons. So the first 5 seasons contributed 5 * 20 = 100 episodes. The second 5 seasons contributed 5 * 25 = 125 episodes. So there were a total of 100 + 125 = 225 episodes.
The answer: 225
What was the question?
Question: The show Magic King was on the air for 10 seasons and 20 episodes per season for the first half of seasons and 25 for the second half of the show. How many total episodes were there?


27 * 4 = 108 yards. 2 * (12 + 9) = 42 yards. 108 + 42 = 150 yards. The playground and garden have a combined fence length of 150 yards.
The answer: 150
Reverse engineering the question: There is a playground that is surrounded by a square fence that has a side length of 27 yards. There is a 12 yard by 9 yard garden that has fencing around it. How many yards of fencing do the playground and garden have together?


Henry and Paul collected a total of 11 + 24 = 35 seashells. To make a total of 59, Leo must have collected 59 - 35 = 24 seashells. He gave out a quarter of 24 seashells which is 24 * (1 / 4) = 6 seashells. They are now left with 59 - 6 = 53 seashells.
The answer: 53
Reverse engineering the question:
Henry, John and Leo collected some seashells from the beach. Henry collected 11, Paul 24. If they initially collected 59 seashells in total and Leo gave a quarter of his collection to a younger kid they met, how many do they have in total now?