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    3. Quantitative Aptitude
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    5. Find the missing number. 1,3,7,15,31,63,127,....

    Question

    Find the missing number.

    1,3,7,15,31,63,127,....
    A 255 Correct Answer Incorrect Answer
    B 250 Correct Answer Incorrect Answer
    C 225 Correct Answer Incorrect Answer
    D 155 Correct Answer Incorrect Answer

    Solution

       255 = 28 - 1

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