What numbers should replace the question marks if the same sequence has to be followed in the given series:
71, 81, 74, 77, 77, 73, 80, 69, ?, ?, ?, ?
(A) 65
(B) 86
(C) 61
(D) 83
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (D), (A), (B), (C)
The terms go up and down by turns, so the series is two series written alternately: one in the odd places and one in the even places.
Odd places: 71, 74, 77, 80 — add 3 each time, so the next two are 83 and 86
Even places: 81, 77, 73, 69 — subtract 4 each time, so the next two are 65 and 61
Taken alternately, the four missing terms are 83, 65, 86, 61, that is (D), (A), (B), (C)