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What will come in place of ‘?’ in the following number series? 5, 45, 315, 1575, ?, 4725

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What will come in place of ‘?’ in the following number series?

5, 45, 315, 1575, ?, 4725
1). 3150
2). 4725
3). 1575
4). 945


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1 answers

2 vote
Answered by on | Votes 2 |

In this series, consecutive odd numbers starting from 9 in decreasing order are multiplied.

⇒ 5 × 9 = 45,

⇒ 45 × 7 = 315,

⇒ 315 × 5 = 1575,

1575 × 3 = 4725 = ?

⇒ 4725 × 1 = 4725,

∴ ? = 4725

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