Q: Mark buys a Magic card for $100, which then triples in value. How much profit would he make selling it?
A: The value went up to 100 * 3 = $300. So he gained 300 - 100 = $200. The answer is 200.

Q: There are twice as many cows as dogs at a petting farm. If there are currently 184 cows at the farm, and the farm owner decides to sell 1/4 of the cows and 3/4 of the dogs, how many animals are remaining on the farm?
A: If there are 184 cows, twice the number of dogs, then there are 184 / 2 = 92 dogs on the farm. When the farm owner decided to sell 1 / 4 of cows, he sold 1 / 4 * 184 = 46 cows. The total number of cows remaining on the farm is 184 - 46 = 138. If the farm owner also sold 3 / 4 of the dogs, he sold 3 / 4 * 92 = 69. The total number of dogs remaining on the farm is 92 - 69 = 23. The total number of animals remaining on the farm is 23 + 138 = 161. The answer is 161.

Q: Sandra has a box of apples that weighs 120 pounds. She's going to use half the weight in apples to make applesauce. The rest will be used to make apple pies. She needs 4 pounds of apples per pie. How many pies will she be able to make?
A:
The box weighs 120 pounds and she's going to use half of it to make applesauce so she'll use 120 / 2 = 60 pounds for applesauce. The box weighs 120 pounds and she'll use 60 pounds for applesauce so that leaves 120 - 60 = 60 pounds of apples. She has 60 pounds of apples and she needs 4 pounds to make a pie so she can make 60 / 4 = 15 pies. The answer is 15.