What will come in place of the question mark (?) in the following series?
11, 2, 18, 6, 25, 18, 32, ?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 54
The terms jump up and down, so read the terms in odd places and in even places as two separate series:
Odd places: 11, 18, 25, 32, each 7 more than the one before
Even places: 2, 6, 18, ?, each three times the one before
The question mark is in the 8th place, an even place, so it is \(18\times3=54\).