Come up with a question and reasoning that would justify [720] as the answer.
The question is: Out of the 500 marbles that Cindy had, she gave her four friends 80 marbles each. What's four times the number of marbles she has remaining?
Reasoning: Cindy gave her four friends 80 marbles each, a total of 4 * 80 = 320 marbles. She was left with 500 - 320 = 180 marbles. Four times the number of marbles she has remaining is 180 * 4 = 720.

Come up with a question and reasoning that would justify [296] as the answer.
The question is: Amaya scored 20 marks fewer in Maths than she scored in Arts. She also got 10 marks more in Social Studies than she got in Music. If she scored 70 in Music and scored 1/10 less in Maths, what's the total number of marks she scored in all the subjects?
Reasoning: The total marks Amaya scored more in Music than in Maths is 1 / 10 * 70 = 7 marks. So the total marks she scored in Maths is 70 - 7 = 63 marks. If she scored 20 marks fewer in Maths than in Arts, then he scored 63 + 20 = 83 in Arts. If she scored 10 marks more in Social Studies than in Music, then she scored 70 + 10 = 80 marks in Social Studies. The total number of marks for all the subjects is 70 + 63 + 83 + 80 = 296 marks.

Come up with a question and reasoning that would justify [3000] as the answer.
The question is: Two brick walls are being built. Each wall has 30 bricks in a single row and there are 50 rows in each wall. How many bricks will be used to make both walls?
Reasoning: Each brick wall needs 30 x 50 = 1500 bricks. Thus, the two walls need 1500 x 2 = 3000 bricks.