Question

    How many factors of 23 × 33 × 54 × 73 are divisible by 50 but not by 100.

    A 30 Correct Answer Incorrect Answer
    B 24 Correct Answer Incorrect Answer
    C 48 Correct Answer Incorrect Answer
    D 36 Correct Answer Incorrect Answer

    Solution

    50=52×2 100=52×22 23 × 33 × 54 × 73 =52×2×22×52×33×73) =52×33×73 Total factor=3×4×4 =48.

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