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    Question

    What is the Highest Common Factor of 64, 128 and 256?

    A 64 Correct Answer Incorrect Answer
    B 32 Correct Answer Incorrect Answer
    C 128 Correct Answer Incorrect Answer
    D 16 Correct Answer Incorrect Answer

    Solution

    Factors of 64 = 2 × 2 × 2 × 2 × 2 × 2 Factors of 128 = 2 × 2 × 2 × 2 × 2 × 2 × 2 Factors of 256 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 Highest Common Factor = 2 × 2 × 2 × 2 × 2 × 2 = 64

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