Question
Find the wrong number in the given number series.
2, 6, 24, 121, 720, 5040Solution
ATQ,
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120, not 121
6! = 720
7! = 5040
Hence, 121 is incorrect. It should be 120.
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