10th Class Mathematics Real Numbers Question Bank Real Numbers

  • question_answer Which of the following statements is INCORRECT?                     

    A) For natural numbers a and b, if a divides \[{{b}^{2}}\]then a divides b.          

    B) For any natural number \[n,\,\sqrt{n-1}+\sqrt{n+1}\]is irrational.

    C)  Product of distinct prime numbers is always equal to their L.C.M.

    D)  For any natural number n, \[{{6}^{n}}\] never ends with digit zero.

    Correct Answer: A

    Solution :

    If a (any prime number) divides \[{{b}^{2}}\] and b is natural number, then a divides b.

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