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Asked: March 16, 2021In:

Let x = (633) 24 – (277) 38 + (266) 54. What is the units digit of x?

| Let x = (633)²⁴ – (277)³⁸ + (266)⁵⁴. What is the units digit of x?

A. 6

B. 4

C. 7

D. 8

We will check cyclicity of 3 and 7, as 6 raised to any power will have unit digit as 6. Hence,

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