Find the missing number in the series given below.
2, 7, 17, 37, ?, 157
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 77
Each term is the one before it multiplied by 2, plus 3:
\(2\times2+3=7\)
\(7\times2+3=17\)
\(17\times2+3=37\)
\(37\times2+3=77\)
Check: \(77\times2+3=157\), the last term
So the missing number is 77.