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      Question

      The greatest number that will divide 398, 437 and 5425

      leaving 7, 12 and 2 as remainders, respectively, is:
      A 11 Correct Answer Incorrect Answer
      B 15 Correct Answer Incorrect Answer
      C 17 Correct Answer Incorrect Answer
      D 19 Correct Answer Incorrect Answer

      Solution

      Deducting the remainders from numbers we get, 398 โˆ’ 7 = 391 437 โˆ’ 12 = 425 5425 โˆ’ 2 = 5423 Now, 391 = 17 ร— 23 425 = 17 ร— 52 5425 = 17 ร— 11 ร— 29 So, HCF of these numbers = 17 โˆด The greatest number is 17.

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