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

Q: Problem: a = 5 ^ 10 - 625 ^ 2 and a / x is an integer , where x is a positive integer greater than 1 , such that it does not have a factor p such that 1 < p < x , then how many different values for x are possible ?

A: two
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Q: Problem: a cycle is bought for rs . 900 and sold for rs . 1170 , find the gain percent ?

A: 30 %
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Q: Problem: the average of first six prime numbers greater than 20 is ?

A:
3
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