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Question
Odd man out: 1, 3, 7, 15, 27, 63, 127
Options:
A .  7
B .  15
C .  27
D .  63
Answer: Option C


The sequence is +2, +4, +8 i.e. +2, +22, +23,.... .So, 27 is wrong and must be replaced by (15 + 24) i.e. (15 + 16) or 31.



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