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Multiple choice general knowledge

Find the last digit 1!+2!+3!+.....+100!

  1. 0

  2. 3

  3. 5

  4. 7

  5. 2

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For n ≥ 5, n! ends in 0 (contains 2×5). So 5!+6!+...+100! ends in 0. Sum = 1!+2!+3!+4! = 1+2+6+24 = 33. Last digit = 3.

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