Question

Find the missing number in the following number series. 4, 17, 34, 53, 76, ?
1. 105
2. 85
3. 95
4. 103

Answer 1

Correct Answer - Option 1 : 105

Consider the above series,

⇒ 4, 17, 34, 53, 76, ?

The logic of the series can be explained as:

⇒ ''17–4=13''

⇒ ''34–17=17''

⇒ ''53–34=19''

⇒ ''76–53=23''

⇒ 13,17,19,23 are consecutive prime numbers after the number 10

The next prime number is 29.

⇒ ''76+29=105''

∴ The missing number is 105