Question
If 7 16 x
90 171 292 Then, 2x 2 + 1 + x = ? 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 :Solution
7 + 32 = 16 16 + 52 = 41 41 + 72 = 90 90 + 92 = 171 171 + 112 = 292 Hence, x= 41 Hence, (2×x2 + 1 + x) = (2×412 + 1 + 41) = 3362 + 1 + 41 = 3404
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