[Question]: Mac loves the shape of quarters and is willing to trade money for them, even if he loses value. He tells his brother that he will trade him 3 dimes for a quarter or 7 nickels. He trades for 20 quarters with dimes and 20 quarters with nickels. How many dollars did Mac lose?
[Answer]: Three dimes is equal to $.3 because 3 x .1 = .3. Seven nickels is equal to $.35 because 7 x .05 = .35. Each time he trades with dimes he lose $.05 because .3 - .25 = .05. Each time he traded with nickels he lost $.1 because .35 - .25 = .1. He lost $1 from trading with dimes because 20 x .05 = 1. He lost $2 from trading with nickels because 20 x .1 = 2. He lost $3 total because 1 + 2 = 3.
So the answer is 3.

[Question]: The number of coronavirus cases in a certain country was 300 infections per day during the first wave. However, the number of cases increased by four times more per day as a new coronavirus variant started infecting people in a second wave. What was the total number of infections during the second wave in 2 weeks?
[Answer]: When the number of cases increased by four times more per day during the second wave, there were 4 * 300 = 1200 more infections per day than during the first wave. The total number of infections during the second wave per day was 1200 + 300 = 1500. For two weeks with 14 days, the number of me infections was 14 * 1500 = 21000.
So the answer is 21000.

[Question]: Wilson decides to go sledding on some nearby hills. On the 2 tall hills, he sleds down them 4 times each and on the 3 small hills, he sled down them half as often as he sleds down the tall hills. How many times did he sled down the hills?
[Answer]:
On the tall hills, he sleds down 2 tall hills * 4 times per tall hill = 8 times. He sleds down the small hills half as often so he sleds down each hill 4 times per tall hill / 2 = 2 times per small hill. On the small hills, he sleds down 3 small hills * 2 times per small hill = 6 times. So in total, Wilson sled down the hills 8 times on tall hills + 6 times on small hills = 14 times.
So the answer is 14.