Sum of Positive Integers x and y

Hard Data Sufficiency Determining Sufficiency

Let x and y be positive integers. We want to determine the value of the expression x + y.

Statement (1): The product of x and y is equal to 36.

Statement (2): The difference between x and y is 4.

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 (1) and (2) 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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