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

  • question_answer
    The sum of exponents of prime factors in the prime-factorisation of 196 is:            (CBSE 2020)

    A) 3

    B) 4

    C) 5

    D) 2

    Correct Answer: B

    Solution :

    Sol.      [b] \[196=2\times 2\times 7\times 7={{2}^{2}}\times {{7}^{2}}\]
                 \[\therefore \]sum of exponent of prime factors
                   =2+2=4            


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