Math, asked by veer121208ot1bcb, 1 year ago

If S = 1! 2! 3! ... 99! , then the units' digit in the value of S is : (a) 9 (b) 8 (c) 5 (d) 3

Answers

Answered by thesiddhantsharma

B. As there are plenty of even numbers in the multiplication. And multiplication of even number with an odd or even number is always even. Answer is b)8

veer121208ot1bcb: But the actual answer is 3 and I want to know how it came.

thesiddhantsharma: dude

thesiddhantsharma: I'll still go with the second one

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