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    Question

    When a certain number is multiplied by 7, the product

    entirely comprises ones only (1111…..). What is the smallest such number ?
    A 15713 Correct Answer Incorrect Answer
    B 15723 Correct Answer Incorrect Answer
    C 15783 Correct Answer Incorrect Answer
    D 15873 Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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