5^{6} - 1 is divisible by

- 5
- 13
- 31
- None of these

**Answer**

5^{6} - 1 = (5^{3} - 1)(5^{3} + 1) = 124*126

124 is divisible by 31.

**The correct option is C.**

5^{6} - 1 is divisible by

- 5
- 13
- 31
- None of these

**Answer**

5^{6} - 1 = (5^{3} - 1)(5^{3} + 1) = 124*126

124 is divisible by 31.

**The correct option is C.**