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题库 / Prep2007E2-DS-155
If 500 is the multiple of 100 that is closest to x and 400 is the multiple of 100 that is closest to y, which multiple of 100 is closest to x + y ?
(1) x < 500
(2) y < 400
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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500是最接近x的100的倍数 ，范围从450-550。
如果小于450，比如440，那400就比500更接近440；
若大于550，比如560，那600就更接近560，而不是550。
同理得出y的范围
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