Question

4,9,17,35,? ,139. find the series
the options are
a, 89
b’79
c,69
d,59​

Answer 1

Answer:

c) 69

Explanation:

4, 9 , 17, 35, 69, 139, 277 (X=139).

...

4*2= 8 +1 = 9.

9*2= 18–1 = 17.

17*2= 34+1 = 35.

35*2= 70–1=69.

69*2= 138+1 = 139. ( Answer)