Question

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

61, 70, 88, 124, 196, 340, ?

1. 508
2. 488
3. 628
4. 688
5. 704

Answer 1

Correct Answer - Option 3 : 628

GIVEN:

61, 70, 88, 124, 196, 340, ?

Concept Used:

Series follows double addition in increasing order.

Calculation:

The series follows the following pattern:

⇒ 61 + 9 = 70

⇒ 70 + 18 = 88

⇒ 88 + 36 = 124

⇒ 124 + 72 = 196

⇒ 196 + 144 = 340

⇒ 340 + 288 = 628

∴ The required value of "?" is 628.