CMAT
Exam
Numerical Ability
7, 15, 31, 63, __
a. 95
b. 117
c. 127
d. 136
Read Solution (Total 3)
-
- 2^3-1=7
2^4-1=15
2^5-1=31
2^6-1=63
next is (2^7-1)=127
c. 127 - 10 years agoHelpfull: Yes(1) No(0)
- 7*2=14+1=15
15*2=30+1=31
31*2=62+1=63
63*2=126+1=127
so ans is c.127 - 10 years agoHelpfull: Yes(1) No(0)
- c) 127
7+8=15
15+16=31
31+32=63
63+64=127 - 7 years agoHelpfull: Yes(0) No(0)
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