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      Question

      Find the HCF of 84 and

      630.
      A 34 Correct Answer Incorrect Answer
      B 58 Correct Answer Incorrect Answer
      C 42 Correct Answer Incorrect Answer
      D None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Prime factors of 84 = 2 Γ— 2 Γ— 3 Γ— 7

      Prime factors of 630 = 2 Γ— 3 Γ— 3 Γ— 5 Γ— 7

      HCF = 2 Γ— 3 Γ— 7 = 42

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