What should come in place of the question mark (?) in the following number series ? 13, 13, 65, 585, 7605, 129285, ?

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RRB ASM Exam (Bhubaneshwar) 2009 click here to view all questions

What should come in place of the question mark (?) in the following number series ?
13, 13, 65, 585, 7605, 129285, ?

A2456415

B2235675

C2980565

D2714985

Nithin K ? May 3 '2018 at 20:36

Correct Answer: D [2714985]

Explanation:

\(13 \times 1 = 13 \)

\(13 \times 5 = 65 \)

\(65 \times 9 = 585 \)

\(585 \times 13 = 7605 \)

\(7605 \times 17 = 129285 \)

\(129285 \times 21 = 2714985 \)

So the next number is 2714985.
The series is 13, 13, 65, 585, 7605, 129285, 2714985.

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Correct Answer: D [2714985] Explanation: \(13 \times 1 = 13 \) \(13 \times 5 = 65 \) \(65 \times 9 = 585 \) \(585 \times 13 = 7605 \) \(7605 \times 17 = 129285 \) \(129285 \times 21 = 2714985 \) So the next number is 2714985. The series is 13, 13, 65, 585, 7605, 129285, 2714985. Nithin K ? answered May 3 '2018 at 20:36 All Comments

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