Question
If 4 x 4 7 15 38.5 Then, ( x + 1) ( 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 :
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