A snack machine accepts only quarters. Candy bars cost 25, each piece of chocolate costs 75, and a pack of juice costs 50. How many quarters are needed to buy three candy bars, two pieces of chocolate, and one pack of juice?
Let's think: Three candy bars cost 25 x 3 = 75. Two pieces of chocolate cost 75 x 2 = 150. So, the total amount needed to buy those is 75 + 150 + 50 = 275. Since a quarter is equal to 25, therefore 275 / 25 = 11 quarters are needed.. The answer is: 11.

Jason has six fish in his aquarium. He realizes that every day the number of fish doubles. On the third day he takes out one-third of the fish. On the fifth day he takes out one-fourth of the fish. On the seventh day he adds 15 more fish. How many fish in total does he have?
Let's think: Start by finding how many fish were in the aquarium on the third day 6 * 2 * 2 = 24. On day three, Jason took out one - third of the fish 24 / 3 = 8. So at the end of day three, he has 24 - 8 = 16 fish. On day five he has 16 * 2 * 2 = 64 fish, but he takes out one - fourth. So he took out 64 / 4 = 16 fishes. So at the end of day five, he has 64 - 16 = 48 fish. On day seven he has 48 * 2 * 2 = 192 fish. He adds in 15 more, so he has 192 + 15 = 207 fish in total.. The answer is: 207.

John decides to buy some birds. He got 50 dollars from each of his 4 grandparents. If each bird costs $20, how many wings did all the birds have?
Let's think: He got 4 * 50 = $200. That means he was able to buy 200 / 20 = 10 birds. Since each bird has 2 wings he got 10 * 2 = 20 wings.. The answer is: 20.

John Smith buys 3 cakes for $12 each and splits the cost with his brother. How much did he pay?
Let's think:
The cakes cost 3 * 12 = $36. So he paid 36 / 2 = $18.. The answer is: 18.