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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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首先，明确什么是500 is the multiple of 100 that is closest to x。There are lots of multiples of 100，eg 100, 200, 300, 400, 500, 600 etc， but 500 is THE ONE which is closest to X.
题干：已知450
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