What will come at the place of question mark ?
9, 17, 33, 65, ?
A. 117
B. 119
C. 129
D. 99
Answer: Option C
Solution (By Examveda Team)
First term → 9
Second term → (9 *2 -1) = 17
Third term → (17 *2 -1) = 33
Fourth term → (33 *2 -1) = 65
Fifth term → (65 *2 -1) = 129
This Question Belongs to Competitive Reasoning >> Number Series Completion
4*2=8+1=9
8*2=16+1=17
16*2=32+1=33
32*2=64+1=65
64*2=128+1=129
9:17::8:?
It is also
2×2×2=8+1
2×2×2×2=16+1
2×2×2×2×2=32+1
2×2×2×2×2×2=64+1
2×2×2×2×2×2×2=128+1