The task is to generate the correct answer for a given math problem.

Problem: by selling an article for $ 225 a person gains $ 75 . what is the gain % ?
50 %

Problem: how many numbers between 400 and 1000 can be made with the digits 2 , 3,4 , 5,6 and 0 ?
60

Problem: indu gave bindu rs . 7500 on compound interest for 2 years at 4 % per annum . how much loss would indu has suffered had she given it to bindu for 2 years at 4 % per annum simple interest ?

1