Question

The digit in the unit position of the integer 1! + 3! +51 + 71 +
+ 991​

Answer 1

Answer:

Zero

Explanation:

1! = 1

3! = 3 x 2 x 1 = 6

Now, 1 + 6 + 51 + 71 + 991 = 1120

Digit at the unit position will be zero.

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