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.