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题库 / GMATAdvanced-DS-35
If S is the sum of the first n positive integers, what is the value of n?
(1)S<20
(2)S2>220
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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题目错了 条件二是S的平方
题目有误：应改为（2）S^2>220
（2）应为S^2>220
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