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

[EX Q]: Problem: a cat chases a rat 6 hours after the rat runs . cat takes 4 hours to reach the rat . if the average speed of the cat is 90 kmph , what s the average speed of the rat ?
[EX A]: 36 kmph

[EX Q]: Problem: h is a positive integer and 225 and 216 are both divisors of h . if h = ( 2 ^ a ) * ( 3 ^ b ) * ( 5 ^ c ) , where a , b and c are positive integers , what is the least possible value of a + b + c ?
[EX A]: 8

[EX Q]: Problem: a cycle is bought for rs . 1500 and sold for rs . 1620 , find the gain percent ?
[EX A]:
8