Question

what can be used in place of x to complete the below given series 3,x,5,5,9,8,15,13

Answer 1

Is it 4.

if no, please let me know

Answer 2

Answer:

3,x,5,5,9,8,15,13

now take alternative places

3,5,9,15 and x,5,8,13

according to first series

5-3=2

9-5=4

15-9=6

when we compare the difference 2,4,6 these are even numbers

5-x=y

8-5=3

13-8=5

these are odd numbers x, 3,5 then y= 1

5-x=1

5-1=x

4=x