In series 1, only one number is wrong. If the wrong number is corrected, the series gets established following a certain logic. Complete series 2 with same logic and answer the given question.
| Series 1: | 7 | 6 | 10 | 27 | 104 | 515 |
| Series 2: | 9 | a | b | c | d | e |
What will come in place of (d) ?
Explanation
Given number series 1 follows the logic,
⇒ 7×1-1=6
⇒ 6×2-2=10
⇒ 10×3-3=27
⇒ 27×4-4=104
⇒ 104×5-5=515
Similarly, series 2
(a)⇒ 9×1-1=8
(b)⇒ 8×2-2=14
(C)⇒ 14×3-3=39
(d)⇒ 39×4-4=152.
Hnce, Option A is correct.
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