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: | 6 | 16 | 57 | 244 | 1245 | 7506 |
| Series 2: | 4 | a | b | c | d | e |
What will come in place of (d) ?
Explanation
Given Number series 1 follows the logic,
⇒ 6×2+2²=12+4=16
⇒ 16×3+3²=48+9=57
⇒ 57×4+(4)²=228+16=244
⇒ 244×5+5²=1220+25=1245
Similarly, series 2
(a)⇒ 4×2+2²=8+4=16
(b)⇒ 12×3+3²=36+9=45
(c)⇒ 45×4+4²=180+16=196
(d)⇒ 196×5+52²=980+25=1005
Hence, Option E is correct.
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