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    Question

    The least perfect square number which is divisible by 9, 12, 15, 24:

    A 900 Correct Answer Incorrect Answer
    B 1600 Correct Answer Incorrect Answer
    C 3600 Correct Answer Incorrect Answer
    D 6400 Correct Answer Incorrect Answer

    Solution

    lcm OF  9, 12, 15, 24. 9=3×3 12=2×2×3 15=3×5 24=2×2×2×3 .LCM=2×2×2×3×3×5=360 To make the number perfect square multiply by 2 and 5 in 360, then =360×5×2 =3600

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