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easy · GMAT Quantitative Reasoning

For two numbers x and y, the product xy = 0.

Which of the following must be true?

  1. Either x = 0 or y = 0.
  2. Both x and y are 0.
  3. Neither x nor y can be negative.
  4. x and y are additive inverses.
  5. x and y are equal to each other.

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