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[转帖]one more D/S
If x and y are positive integers such that x=8y+12, what is the greatest common divisor of x and y?
1) x=12u, where u is an integer.
2) y=12u, where z is an integer.
OG Page 261 T240, I failed to figure out why the correct answer is B, Anybody can help? Thank you. |
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