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      Question

      If the HCF and LCM of two numbers are 8 and 160

      respectively, then the sum of the numbers is:
      A 72 Correct Answer Incorrect Answer
      B 80 Correct Answer Incorrect Answer
      C 74 Correct Answer Incorrect Answer
      D 70 Correct Answer Incorrect Answer

      Solution

      HCF =8 LCM=160 Let the number is 8x and 8y. So, 8x Γ— 8y =160Γ—8 xy =20 the co-prime factor of the 20= (5,4) number is -8Γ—5=40 and 8Γ—4=32. The sum of the numbers =40+32=72.

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