Question

Find the wrong term in sequence :1, 3, 7, 15, 27, 63, 127

• A. 7
• B. 15
• C. 27
• D. 63
• E. 3

Answer 1

The correct option is C 27

The sequence is 2, $2^2$, $2^3$, $2^4$, $2^5$, $2^6$ etc. so the correct term is 15+16=31 [Double +1 is the rule] so 27 is wrong 31 is right