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      Question

      The HCF of two numbers is 21. Which of the following can

      never be their LCM?
      A 126 Correct Answer Incorrect Answer
      B 191 Correct Answer Incorrect Answer
      C 63 Correct Answer Incorrect Answer
      D 231 Correct Answer Incorrect Answer

      Solution

      HCF of two numbers is 21. This means 21 is a common factor to both numbers. LCM is common multiple for the two numbers.

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