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Value Questions versus Yes-or-No Questions
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GMAT
DI.103 Value Questions versus Yes-or-No Questions
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Data Sufficiency. Determine whether the statements provide enough information to answer the question exactly or definitively. x and y are real numbers. What is x - y? (1) (x - y)
2
= 4. (2) x + y = 6.
A
Statement (1) alone is sufficient to determine the value of x - y from the squared difference; statement (2) alone is not.
B
Statements (1) and (2) together are not sufficient to determine the value of x - y from the squared difference.
C
Statements (1) and (2) together are sufficient to determine the value of x - y from the squared difference; neither statement alone is sufficient.
D
Statement (2) alone is sufficient to determine the value of x - y from the squared difference; statement (1) alone is not.
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