The digit in the unit's place of the product 81x82x83x84x...x99 is

Question: The digit in the unit's place of the product 81x82x83x84x...x99 is

A. 0
B. 4
C. 6
D. 8

Answer: A. 0


Descriptive Answer
Product of unit's digit
= 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 0 = 0
Therefore, the required digit in the unit's place is 0.

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