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    Question

    If x = 23 × 32 x 5 ×

    73, y = 22 × 33 x 52 × 72, and z = 24 x 3 x 53 × 7. then the HCF of x, y and z is:
    A 420 Correct Answer Incorrect Answer
    B 1260 Correct Answer Incorrect Answer
    C 840 Correct Answer Incorrect Answer
    D 630 Correct Answer Incorrect Answer

    Solution

    x = 23 × 32 x 5 × 73 y = 22 × 33 x 52 × 72, z = 24 x 3 x 53 × 7. HCF=22 ×3×5×7 =420.

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