Question: The fifth grade class at Rosa Parks Elementary School is holding a food drive. Half the students in Ms. Perez's class collected 12 cans each, two students didn't collect any, and the remaining 13 students students each collected 4 cans. If Ms. Perez's class has 30 students, how many cans did they collect total?
Answer: Then find how many students in Ms. Perez's class collected 12 cans each: 30 students / 2 = 15 students. Then find how many cans the students who collected 12 cans each collected in total: 15 students * 12 cans / student = 180 cans. Then find how many cans the students who collected 4 cans each collected in total: 13 students * 4 cans / student = 52 cans. Then add both amounts of cans to find the total: 180 cans + 52 cans = 232 cans. The answer is 232.

Question: Donna made a cake to take to a party where the guests ate half the cake. The day after the party, she shared half the leftovers with her brothers. The following day, she ate one piece as a midnight snack. Twice as many pieces as her snack were left. How many pieces was the cake to begin with?
Answer: Donna had 2 * 1 = 2 pieces of cake left. Before her snack, there were 2 + 1 = 3 pieces left. Those 3 pieces were half the leftovers, so she had 3 * 2 = 6 pieces before sharing with her brothers. Those 6 pieces were half the party leftovers, so the cake was 2 * 6 = 12 pieces before the party. The answer is 12.

Question: Hallie is an artist. She wins an art contest, and she receives a $150 prize. She sells 3 of her paintings for $50 each. How much money does she make in total from her art?
Answer: The money she earns from selling paintings is 3 * $50 = $150. The total money she makes from her art is $150 + $150 = $300. The answer is 300.

Question: Happy Island has 60 turtles. This means there are 10 more than 2 times as many turtles on Happy Island as on Lonely Island. How many turtles are there on Lonely Island?
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.
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After subtracting 10 from the number of turtles on Happy Island, we get 60 - 10 = 50 turtles. Dividing this number by two, we find that the number of turtles on Lonely Island is 50 / 2 = 25 turtles. The answer is 25.