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Letters for Digits

The tens digi...

Question

The tens digit of $1! + 2! + . . . . + 29!$ is

A

1

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B

2

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C

3

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D

4

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Solution

The correct option is A $1$
If we look the series then we find that after $10!$ unit and tens digit are zero ie $. . . . . . . . .00$
So tens digit of given series will depends on only the sum of $1! + 2! + 3! + 4! + 5! + 6! + 7! + 8! + 9!$ then that comes out 409113 then tens digit is 1 in given series

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