Question

What should come in place of question mark ‘?’ in the following number series?

2, 3, 7, 25, 121, ?

1. 520
2. 540
3. 721
4. 620
5. 530

Answer 1

Correct Answer - Option 3 : 721

Calculation:

Considering the above series,

2, 3, 7, 25, 121, ?

The logic of the series can be explained as,

1! + 1 = 2

2! + 1 = 3

3! + 1 = 7

4! + 1 = 25

5! + 1 = 121

6! + 1 = 721

⇒ ? = 721

∴ The value of ? is 721.