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      Question

      If the highest common factor (HCF) of x and y is 15,

      then the HCF of 36x² - 81y² and 81x² - 9y² is divisible by_________.
      A 135 Correct Answer Incorrect Answer
      B 120 Correct Answer Incorrect Answer
      C 180 Correct Answer Incorrect Answer
      D 90 Correct Answer Incorrect Answer

      Solution

      The correct answer is A

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