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10th Class Mathematics Real Numbers Question Bank MCQs - Real Number

  • question_answer
    Write the HCF of the smallest composite number and the smallest prime number.

    A) 1

    B) 2

    C) 3

    D) 4

    Correct Answer: B

    Solution :

    Smallest composite number \[=4=2\times 2={{2}^{2}}\]
     and smallest prime number \[=2={{2}^{1}}\]
     \[\therefore \,\,\,HCF\left( 4,2 \right)={{2}^{1}}=2\]
     [since, HCF is the product of the smallest power of each common prime factor involved in the numbers]
     


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