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      Question

      Ratio of two numbers 4:9 and their LCM is 1620. Find

      the sum of the given two numbers.
      A 520 Correct Answer Incorrect Answer
      B 560 Correct Answer Incorrect Answer
      C 585 Correct Answer Incorrect Answer
      D 600 Correct Answer Incorrect Answer

      Solution

      Let the two numbers be '4h' and '9h', where 'h' is the HCF of the two given numbers. Product of two numbers = (Product of LCM and HCF) of the given two numbers 4h ร— 9h = h ร— 1620 Or, 36h = 1620 So, 'h' = (1620 / 36) = 45 Therefore, the required sum = 4h + 9h = 13h = 13 ร— 45 = 585 Hence, option c

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