Come up with a question and reasoning that would justify [25] as the answer.
The question is: Dana has 15 more pencils than Jayden, who has twice as much as Marcus. How many more pencils does Dana have than Marcus, if Jayden has 20 pencils?
Reasoning: Dana has 15 more pencils than Jayden who has 20, so Dana has 20 + 15 = 35 pencils. Jayden has 20 pencils which is twice as much as Marcus's so Marcus has 20 / 2 = 10 pencils. Dana has 35 - 10 = 25 more pencils than Marcus.

Come up with a question and reasoning that would justify [80] as the answer.
The question is: Reese has been practicing piano for four hours every week. How many hours will he practice after five months?
Reasoning: If Reese practices 4 four hours every week, in a month, with four weeks, he would have practiced for 4 * 4 = 16 hours. In five months, Reese would have practiced for 5 * 16 = 80 hours.

Come up with a question and reasoning that would justify [10] as the answer.
The question is: Hannah has three dogs. The first dog eats 1.5 cups of dog food a day. The second dog eats twice as much while the third dog eats 2.5 cups more than the second dog. How many cups of dog food should Hannah prepare in a day for her three dogs?
Reasoning: The second dog eats 1.5 x 2 = 3 cups of dog food. The third dog eats 3 + 2.5 = 5.5 cups. So, Hannah should prepare 1.5 + 3 + 5.5 = 10 cups.