Q: Kim has 4 dozen shirts. She lets her sister have 1/3 of them. How many shirts does she have left?
A: She had 4 * 12 = 48 shirts to start with. She gives away 48 / 3 = 16. So she has 48 - 16 = 32 left. The answer is 32.

Q: The city is holding its annual rubber duck race for charity. The regular size rubber ducks are $3.00 each and the large size rubber duck is $5.00 each. All of the rubber ducks will be dropped into the river at the same time and the first duck that floats across the finish line wins. They sold 221 regular size ducks and 185 large size ducks. How much money did the city raise for charity?
A: They sold 221 regular size rubber ducks at $3.00 each so they made 221 * 3 = $663.00. They sold 185 large rubber ducks at $5.00 each so they made 185 * 5 = $925.00. The regular size ducks brought in $663.00 and the large brought in $925.00 for a total of 663 + 925 = $1,588.00 for charity. The answer is 1588.

Q: Phil has a coin collection he likes to add to. He started with 50 state quarters his parents gave him. Over the next year he doubled this. The following year he collected 3 each month. The year after that he collected 1 every third month. The year after that he lost a quarter of them when he misplaced his collection. How many did he have left after losing some?
A:
Phil started with 50, and doubled this amount the next year for 50 * 2 = 100 coins. Phil then collected 3 per month the following year, and since there are 12 months in a year that was 3 * 12 = 36 coins added. Phil then collected 1 every third month, and since there are 12 months that means he collected one every 12 / 3 = 4 months, for 4 coins added. Before he lost a quarter of his coins, Phil had 100 + 36 + 4 coins, or 140 coins in total. Losing a quarter of 140 coins means Phill lost 140 / 4 = 35 coins. That means Phil had 140 - 35 = 105 coins remaining. The answer is 105.