Q: Hannah wanted to make an apple pie that would serve 8 people. She needed 2 pounds of apples that were on sale for $2.00 per pound. The pre-made pie crust cost $2.00. The lemon cost $.50 and the butter cost $1.50. How much did each serving of pie cost?
A: 1
Step-by-step reasoning process: 2 pounds of apples at $2.00 / pound would cost 2 * 2 = $4.00. If we add all of the purchases together then the total bill was 4 + 2 + .50 + 1.50 = $8.00. There are 8 servings per pie. So $8.00 / 8 servings = $1.00 per serving.


Q: Melanie baked 10 batches of brownies, with 20 brownies in each batch. She set aside 3/4 of the brownies in each batch for a bake sale, put 3/5 of the remaining in a container, and gave out the rest. How many brownies are given out?
A: 20
Step-by-step reasoning process: Melanie set aside 20 x 3 / 4 = 15 brownies from each batch for a bake sale. So, there are 20 - 15 = 5 brownies that are not for bake sale from each batch. Out of the 5, 5 x 3 / 5 = 3 brownies are kept in a container from each batch. Thus, 5 - 3 = 2 brownies are given out from each batch. Therefore, a total of 2 x 10 = 20 brownies are given out from the 10 batches.


Q: John buys 30 ducks for $10 each. They weigh 4 pounds and he sells them for $5 per pound. How much profit did he make?
A: 300
Step-by-step reasoning process: He bought the ducks for 30 * 10 = $300. He sold each duck for 4 * 5 = $20. So he sold all the ducks for 30 * 20 = $600. So he made a profit of 600 - 300 = $300.


Q: Ariella has $200 more in her son's saving account than Daniella has in her son's savings account. Ariella's account earns her simple interest at the rate of 10% per annum. If Daniella has $400, how much money will Arialla have after two years?
A: 720
Step-by-step reasoning process: If Ariella has $200 more in her son's saving account than Daniella has, then she has $400 + $200 = $600. If she earns an interest of 10% in the first year, her savings account increases by 10 / 100 * $600 = $60. In the second year, she earns the same amount of interest, which $60 + $60 = $120. The total amount of money in Ariella's account after two years is $600 + $120 = $720.