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    Question

    The HCF of two numbers 144 and 2160

    is:
    A 124 Correct Answer Incorrect Answer
    B 158 Correct Answer Incorrect Answer
    C 144 Correct Answer Incorrect Answer
    D None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Prime factors of 144 = 2 ├Ч 2 ├Ч 2 ├Ч 2 ├Ч 3 ├Ч 3

    Prime factors of 2160 = 2 ├Ч 2 ├Ч 2 ├Ч 2 ├Ч 3 ├Ч 3 ├Ч 5 ├Ч 9

    HCF = 2 ├Ч 2 ├Ч 2 ├Ч 2 ├Ч 3 ├Ч 3 = 144

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