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      Question

      Three numbers are in the ratio 7:5:4 respectively. If

      the HCF of the numbers is 3, then find the LCM of the numbers.
      A 360 Correct Answer Incorrect Answer
      B 420 Correct Answer Incorrect Answer
      C 252 Correct Answer Incorrect Answer
      D 300 Correct Answer Incorrect Answer

      Solution

      Numbers:
      7 × 3 = 21
      5 × 3 = 15
      4 × 3 = 12
      LCM of 21, 15, and 12 = 420

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