Question

What is the next number in the following number series

3, 5, 8, 15, 28, 51, ?
A) 98
B) 102
C) 87
D) 79

Answer 1

Q:

What is the next number in the following number series
3, 5, 8, 15, 28, 51, ?

A) 98
B) 102
C) 87
D) 79

Answer:   A) 98 

Explanation:

The given number series is 
3, 5, 8, 15, 28, 51, ?

Here the pattern it follows is
3
3 + 2 = 5 ( add prime number less than 3 i.e, 2)
5 + 3 = 8 (3 is prime number less than 5)
8 + 7 = 15 (7 is prime number less than 8)
15 + 13 = 28 (13 is prime number less than 15)
28 + 23 = 51 (23 is prime number less than 28)
51 + 47 = 98 (47 is prime number less than 51)
 
Hence, the next number in the given number series is 98.

Answer 2

hey

here is answer

answer is

98.

in these sequence prime numbers has been followed

like

3+2=5
5+3=8
8+7=15
15+13=28
28+23=51
51+47=98

hope it helps

thanks