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Question

One term in the number series is wrong. Find out the wrong term.
4,6,15,56,280,1644

A
280
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B
1644
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C
56
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D
15
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Solution

The correct option is A 280
The given series follow a pattern :
4×22=6,
6×33=15,
15×44=56,
56×55=275280,
280×66=1644.
Hence, 280 is wrong in the given series.

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