If y is greater than 110 percent of x, is y greater than 75 ?

(1) x > 75

(2) y − x = 10


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.

考题讲解

题目条件为y>1.1x,问y是否大于75。

(1)  如果x>75,则1.1x>82.5,所以有y>1.1x>82.5>75。

(2)  如果y-x=10,则有x=y-10,代入题目的条件,y>1.1*(y-10),解此不等式得y<110,并不能得到y>75。

因此本题答案为(A),仅第一个条件能说明问题,第二个不行。

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