CSC
Company
Logical Reasoning
Number Series
Insert the missing number
15, 31, 63, 127, 255, (....)
A. 513 B. 511
C. 517 D. 523
Read Solution (Total 2)
-
- Option B 511
15*2+1=31
31*2+1=63
63*2+1=127
127*2+1=255
255*2+1=511 - 12 years agoHelpfull: Yes(2) No(1)
- 511 is right answer
- 8 years agoHelpfull: Yes(0) No(0)
CSC Other Question
Insert the missing number
5, 10, 13, 26, 29, 58, 61, (....)
A. 122 B. 64
C. 125 D. 128
Insert the missing number
1, 8, 27, 64, 125, 216, (....)
A. 354 B. 343
C. 392 D. 245