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    Question

    Which of the following devices is widely regarded as the

    earliest known calculating tool?
    A Pascaline Correct Answer Incorrect Answer
    B Difference Engine Correct Answer Incorrect Answer
    C Abacus Correct Answer Incorrect Answer
    D Slide Rule Correct Answer Incorrect Answer
    E Napier’s Bones Correct Answer Incorrect Answer

    Solution

    Abacus – Earliest known calculating device.

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