Question

In the given series one number is missing. Select the correct alternative from the given ones that will complete the series.101, 103, 107, 109, 113, ________ *

Answer 1

Answer:

First term is 101 and second is 103

Difference between them is 103 - 101 = 2

Third term is 107 and difference between 3rd term and 2nd is 107 - 103 = 4

Similarly in all the cases, on observation, we get, numbers are increasing by 2 & 4 alternatively.

Difference between 109 & 113 is 4.

So the difference between 113 and the next term should be of 2, so next term should be 113 + 2 = 115

Hence the required next term is 115.