Multiple choice general knowledge Find the last digit 1!+2!+3!+.....+100! 0 3 5 7 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.