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5th Class Mathematics Factors and Multiples Question Bank Factor & Multiple

  • question_answer
    Which of the following pair is co-prime?

    A)  81, 135                       

    B)  87, 116

    C)  43, 73            

    D)  26, 65

    Correct Answer: C

    Solution :

     HCF of 81 and 135 = 27 HCF of 87 and 116 = 29 HCF of 43 and 73 = 1 HCF of 26 and 65 = 13  Hence, 43 and 73 are co-prime


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