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A number n is a multiple of 2. X is the units digit of 7n and Y is t

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A number n is a multiple of 2. X is the units digit of 7n and Y is t [#permalink] New post   31 Jul 2024, 22:57
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A number n is a multiple of 2. X is the unit’s digit of \(7^n\) and Y is the unit’s digit of \(3^n\)


Quantity A
Quantity B
\(X-Y\)
0



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C
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Re: A number n is a multiple of 2. X is the units digit of 7n and Y is t [#permalink] New post   03 Aug 2024, 09:22
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X and Y have they same unit's digit, either 1 or 9 at the same time. There A and B are both 0.
Answer is C
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Re: A number n is a multiple of 2. X is the units digit of 7n and Y is t [#permalink]
03 Aug 2024, 09:22
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