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    Question

    Find the smallest number that should be multiplied to

    720 so that it becomes a perfect square.
    A 5 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 10 Correct Answer Incorrect Answer
    D 6 Correct Answer Incorrect Answer

    Solution

    720  =  2 4  ×  3 2  ×  5

    Since, only the power of 5 is odd, we need to multiply the given number by 5 once to make it a perfect square.

    Required number = 5

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