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

1)

Find the next number of the series 3,8,15,24....


A) 36

B) 25

C) 35

D) 40

Answer:

Option C

Explanation:

$3=2^{2}-1$,

$8=3^{2}-1$,

$15=4^{2}-1$,

$24=5^{2}-1$

So, next should be $6^{2}-1 =35$