Given series formed in definite pattern and next number follows the predecessor. 

1)

Find the next number of the series1,1,2,4,3,9,4,16,.....


A) 15

B) 10

C) 5

D) 8

Answer:

Option C

Explanation:

The given series two patterns
Pattern consisting of natural numbers which is 1,2,3,4....
Pattern consisting of the square of the 1st pattern .
We need to find the next number in the series which belongs to pattern 1
So number is 5.