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      Question

      Find the difference between sum of digits of LCM and

      HCF of 18, 24 and 60.
      A 5 Correct Answer Incorrect Answer
      B 4 Correct Answer Incorrect Answer
      C 3 Correct Answer Incorrect Answer
      D 2 Correct Answer Incorrect Answer

      Solution

      18 = 2 × 3² 24 = 2³ × 3 And 60 = 2² × 3 × 5 So, HCF = 2 × 3 = 6 So, sum of digits of HCF = 6 = 6 And LCM = 2³ × 3² × 5 = 360 And sum of digits of LCM = 3 + 6 + 0 = 9 So, required difference = 9 - 6 = 3 Hence, option c.

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