Which number will come next in the series given below?
7, 14, 17, 34, 37, 74, ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 77
The steps are not all of one kind, so test two operations in turn: ×2 and +3 alternately.
\(7\times2=14\), \(14+3=17\)
\(17\times2=34\), \(34+3=37\)
\(37\times2=74\)
The next step is +3: \(74+3=77\)
So the next number is 77.