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What should come in place of question mark ‘?’ in the following number series? 64, 122, 714, 12798, ?

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What should come in place of question mark ‘?’ in the following number series?

64, 122, 714, 12798, ?
1). 6426
2). 38394
3). 690930
4). 22410


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Answered by on | Votes 0 |

64 × 2 –$ 6 = 122

122 × 6 –$ 18 = 714

714 × 18 –$ 54 = 12798

12798 × 54 –$ 162 = 690930 = ?

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