GMAT Quantitative Reasoning Practice Test 7

Question : 87 of 100

Marks: +1, -0

X

and

Y

are both integers different from zero, what is the
value of

(X+Y)

?
(1)

X^3=Y^3

.
(2)

Y=10

Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.
Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.
Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.
Either statement BY ITSELF is sufficient to answer the question.
Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question, requiring more data pertaining to the problem.

Solution:

Statement (1) gives us the relations between

X

and

Y

, they must be equal because the power is odd.
Statement (2) gives us

Y

and by using the first statement, we know the value of

X

also. Both statements, taken together, are sufficient.

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