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Difficulty: MediumValue vs. Yes/No Data Sufficiency Decision Logic

In a GMAT Data Sufficiency 'Value' question asking for the numerical value of x+yx + y, a statement that establishes that x+yx + y can equal either 55 or −5-5 is considered sufficient.

Answer: Answer

Answer

False
The assertion is false because GMAT 'Value' Data Sufficiency questions require finding a single, unique numerical value for the target expression. Obtaining two possible values (55 or −5-5) means the value is not uniquely determined, rendering the statement insufficient.

Step-by-Step Solution

1
Identify the question type as a 'Value' Data Sufficiency problem.
The target requirement is to find one unique numerical value for x+yx + y.
Value DS questions require absolute numerical uniqueness.
2
Evaluate the information provided by the statement.
The statement yields two possible values: 55 and −5-5.
Having multiple values means the exact value of x+yx + y cannot be uniquely determined.
3
Determine sufficiency.
Since two distinct values exist, the statement is insufficient, making the assertion false.
Sufficiency in Value DS strictly demands a single unique outcome.

Key Concept

Value Data Sufficiency Decision Logic
Estimated Time:1m 0s
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Topics

Value vs. Yes/No Data Sufficiency Decision Logic

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