[Question]Duke was at a garage sale when he spotted DVDs on sale. They were separated by price into 2 different boxes. In the first box, he found 10 movies that he wanted. These were $2.00 apiece. The second box was marked $5 each and he found 5 movies he wanted. What was the average price of each of the DVDs he bought?
[Answer]In the first box he bought 10 DVDs at $2.00 each, so he paid 10 * 2 = $20.00. In the second box he bought 5 DVDs at $5.00 each, so he paid 5 * 5 = $25.00. He bought 10 + 5 = 15 DVDs. He spent $20 + $25 = $45.00. The average price of each DVD is $45 / 15 = $3.00 each. The answer is 3.
Q: Mark plants some strawberries in his backyard. Every month, the number of strawberry plants doubles. After 3 months, Mark digs up 4 strawberry plants and gives them to his friend. If he still has 20 strawberry plants, how many did he initially plant?
A: First, add the 4 plants Mark gave away to the 20 he has left: 4 + 20 = 24. Then divide this number by 2 to find how many plants Mark had after two months: 24 / 2 = 12. Then divide that number by 2 to find how many plants Mark had after one month: 12 / 2 = 6. Finally, divide that number by 2 to find out how many plants Mark initially planted: 6 / 2 = 3. The answer is 3.
Question: There are twice as many cows in Devonshire as there are hearts on a standard deck of 52 playing cards. If there are 4 hearts on a card, calculate the total cost of the cows when they are sold at $200 each.
Answer: If there are 4 hearts on a card, a standard deck of 52 playing cards will have 208 hearts. There are twice as many cows in Devonshire as there are hearts on a standard deck of 52 playing cards, meaning there are 2 * 208 = 416 cows in Devonshire. The total cost of the cows when they are sold at $200 each is 416 * $200 = $83200. The answer is 83200.
[Question]George had $100. He bought a shirt for $24 and he also bought a pair of socks. Then he had $65 left. How much is a pair of socks?
[Answer]George had $100 - $24 = $76 left after buying a shirt. Since he has $65 left after buying a pair of socks, then a pair of socks costs $76 - $65 = $11. The answer is 11.
Q: Gabby planted a watermelon vine, a peach tree, and two plum trees in the spring. Over the summer, the plants grew and produced fruit. She only got one watermelon to grow, but she got twelve more peaches than that, and three times that number of plums. How many pieces of fruit did Gabby get to pick that summer?
A: Gabby’s peach tree grew 12 + 1 = 13 peaches. Her plum trees grew 13 * 3 = 39 plums. Thus, Gabby got 1 + 13 + 39 = 53 pieces of fruit to pick. The answer is 53.
Question: Chastity made 12 angel food cakes to give to friends. She placed the cakes in boxes, and then walked them out to her car. But she had forgotten her keys. So, she placed the boxes of cakes in one stack on the hood of her car, and then she ran back into the house to get her keys. But before she returned, a black crow came, landed on the stack of cakes, and knocked over half of the stack. When Chastity returned, she picked up half of the fallen cakes, which were not damaged, but the rest of the cakes were destroyed. How many cakes were destroyed?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
There were 12 / 2 = 6 fallen cakes. Half of 6 fallen cakes were destroyed, for a total of 6 / 2 = 3 cakes. The answer is 3.