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题库 / GMATAdvanced-DS-74
If x, y, and d are integers and d is odd are both x and y divisible by d?
(1)x+y is divisible by d.
(2)x-y is divisible by d.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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因为x-y,x+y都能divided by d
(x+y)+(x-y)=2x，（x+y）-（x-y）=2y 也能被d divided
d 是odd，所以x,y都能被d divided
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