The unit digit in the product $(122)^173$ is Options: A . &nbsp8 B . &nbsp2 C . &nbsp6 D . &nbsp4

The unit digit in the product $(122)^173$ is

Question

The unit digit in the product $(122)^173$ is

Options:

A . 8

B . 2

C . 6

D . 4

Answer: Option B
Answer: (b)$2^1 = 2, 2^2 = 4, 2^3 = 8, 2^4 = 16, 2^5 = 32$Unit digit in the product of $(122)^173$= Unit digit in $(122)^1$ = 2(1 = remainder when 173 is divided by 4).

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