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    1. Home
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    3. Quantitative Aptitude
    4. Missing Series
    5. 21      11      12      19.5      41       ?       318

    Question

    Find the missing number in the following number series:

    21      11      12      19.5      41     

     ?       318
    A 100 Correct Answer Incorrect Answer
    B 105 Correct Answer Incorrect Answer
    C 115 Correct Answer Incorrect Answer
    D 125 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    21 x 0.5 + 0.5 = 11  11 x 1 + 1 = 12  12 x 1.5 + 1.5 = 19.5 19.5 x 2 + 2 = 41 41 x 2.5 + 2.5 = 105   105 x 3 + 3 = 318

    Practice Next
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    Relevant for Exams:

    • IBPS PO

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