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Which one of the following can never be the units digit of a perfect cube?

Class 8Perfect CubesCubes and Roots

A2
B8
C4
DNone of these

Step-by-Step Solution

Cubes can end in any digit 0-9.

8^{3} = 512

ends in 2,

2^{3} = 8, 4^{3} = 64

ends in 4. So none of 2, 8, 4 is impossible.

Answer: D) None of these

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