Question

Select the option that will correctly replace the question marks (?) in the series.

19, 31, 49, 73, ?

1. 109
2. 149
3. 103
4. 105

Answer 1

Correct Answer - Option 3 : 103

Given:

19, 31, 49, 73

Calculation:

In the given series the pattern is

19, 31, 49, 73

⇒ 31 - 19 = 12

⇒ 49 - 31 = 18

⇒ 73 - 49 = 24

As we can see the difference increases by 6

⇒ 12, 18, 24, 30

So the next number will be

⇒ 73 + 30 = 103

∴ 103 will replace the ?.