What will come in place of the question mark (?) in the following series?
4, 30, 7, 26, 10, 22, ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 13
The terms jump up and down, so read the terms in odd places and in even places as two separate series:
Odd places: 4, 7, 10, ?, each 3 more than the one before
Even places: 30, 26, 22, each 4 less than the one before
The question mark is in the 7th place, an odd place, so it is \(10+3=13\).