What should come at the place of question mark?
2, 3, 7, 8, 26, 27, 107, 108, ?
Show answer & explanation
Correct answer: B
Explanation
2 → 3 (+1)
7 → 8 (+1)
26 → 27 (+1)
107 → 108 (+1)
Now the first terms of the pairs:
2 → 7 = (2 × 2) + 3
8 → 26 = (8 × 3) + 2
27 → 107 = (27 × 4) − 1
Here the sum (multiplier + offset) is:
2 + 3 = 5
3 + 2 = 5
4 + (−1) = 3
That is, after 5, 5, and 3, 5 comes again.
So the next term:
108 × 4 + 1 = 432 + 1 = 433