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    Question

    Find the wrong number, in the given number series,

    4, 10, 20, 40, 100, 250, 500
    A 10 Correct Answer Incorrect Answer
    B 20 Correct Answer Incorrect Answer
    C 4 Correct Answer Incorrect Answer
    D 40 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, 4 Ă— 2.5 = 10 10 Ă— 2 = 20 20 Ă— 2.5 = 50 50 Ă— 2 = 100 100 Ă— 2.5 = 250 250 Ă— 2 = 500 So, 50 should come in place of 40.

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