Come up with a question and reasoning that would justify [52] as the answer.
The question is: Lucia is a dancer. She takes 2 hip-hop classes a week, 2 ballet classes a week, and 1 jazz class a week. One hip-hop class costs $10. One ballet class costs $12, and one jazz class costs $8. What is the total cost of Lucia’s dance classes in one week?
Reasoning: The total cost of the hip - hop classes is 2 * $10 = $20. The total cost of the ballet classes is 2 * $12 = $24. The total cost of the jazz class is 1 * $8 = $8. The total cost of all of Lucia’s dance classes in one week is $20 + $24 + $8 = $52.

Come up with a question and reasoning that would justify [21] as the answer.
The question is: Mel is three years younger than Katherine. When Katherine is two dozen years old, how old will Mel be in years?
Reasoning: When Katherine is 2 dozen years old, she will be 2 * 12 = 24 years old. If Mel is three years younger than Katherine, then when Katherine is 24 years old, Mel will be 24 - 3 = 21 years old.

Come up with a question and reasoning that would justify [800] as the answer.
The question is: The profit from a business transaction is shared among 2 business partners, Mike and Johnson in the ratio 2:5 respectively. If Johnson got $2500, how much will Mike have after spending some of his share on a shirt that costs $200?
Reasoning: According to the ratio, for every 5 parts that Johnson gets, Mike gets 2 parts. Since Johnson got $2500, each part is therefore $2500 / 5 = $500. Mike will get 2 * $500 = $1000. After buying the shirt he will have $1000 - $200 = $800 left.