Question

In the given series, the number at the place of question mark will be:

3 : 10 : 5 : ?

1. 2
2. 25
3. 26
4. 27

Answer 1

Correct Answer - Option 3 : 26

The logic followed here is:

Squaring the first number then add 1 to it.

3 : 10 →

= 3 : 3² + 1 

= 3 : 9 + 1

Similarly,

5 : ? →

= 5 : 5² + 1

= 5 : 25 + 1

= 5 : 26

Hence, ‘26’ is the correct answer.