Question

Can you solve this hard number series problem - 7, 8, 10, 12, 16, 18 ?

Answer 1

There are 2 series
first is odd digit series
7,7+3=10,10+6=16 so next will be 16+9=25
second is even series
8,8+4=12,12+6=18 so next will be 18+8=26
so complete series is
7,8,10,12,16,18,25,26

Answer 2

Missing number in the series 7,8,10,12,16,18  is 25  & 26

Solution:

The series is going in two alternate ways that means two series are going on.

First is the series containing 7, 10, 16, ? . In this series 7, 10, 16 goes by  

7+3 = 10  

10+6 = 16  

So first is 3 then 6. i.e. multiple of 3 table.

The next series is the series with 8, 12, 18 in this series the number is going or the pattern is even like

8+4 = 12

12+6 = 18

18 + 8 = 26

So to find the question mark we will go with first series,

16 + 9 = 25  

Hence, missing numbers of the sequence is 25 & 26.