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      Question

      The HCF of two numbers is 12 and their LCM is 420. If

      one number is 84, find the other number.
      A 52 Correct Answer Incorrect Answer
      B 23 Correct Answer Incorrect Answer
      C 60 Correct Answer Incorrect Answer
      D 42 Correct Answer Incorrect Answer

      Solution

      Product of two numbers = HCF × LCM = 12 × 420 = 5040 Let other number = x 84 × x = 5040 ⇒ x = 5040 / 84 = 60

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