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    Question

    If  2  4  6  x  14  28   30 Then, x³+ 2

    x+1 = ? In each of the following questions a number series is given.  One term of the series is denoted by X. You have to calculate the value of  X and by using the value of  X,  you have to replace the question mark (?) in the following questions :
    A 1,921 Correct Answer Incorrect Answer
    B 1,753 Correct Answer Incorrect Answer
    C 1,563 Correct Answer Incorrect Answer
    D 1,892 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    2(× 2), 4(+2), 6 (× 2), 12 (+2),  14 (× 2),  28 (+2),  30 Hence, x= 12 Hence, x³+ 2 x  +1 = (12)³+ 2 × 12 + 1 = 1,728 + 24 + 1 = 1,753

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