CSC
Company
Logical Reasoning
Number Series
Find out the wrong number in the series.
3, 7, 15, 39, 63, 127, 255, 511
A. 7 B. 15
C. 39 D. 63
E. 127
Read Solution (Total 1)
-
- Option C 39
3*2+1=7
7*2+1=15
15*2+1=31
31*2+1=63
63*2+1=127
127*2+1=255
255*2+1=511 - 13 years agoHelpfull: Yes(0) No(1)
CSC Other Question
Find out the wrong number in the series.
40960, 10240, 2560, 640, 200, 40, 10
A. 640 B. 40
C. 200 D. 2560
E. 10240
Find out the wrong number in the series.
64, 71, 80, 91, 104, 119, 135, 155
A. 71 B. 80
C. 104 D. 119
E. 135