Question
If 2, 7, 20, x , 110, 235,
Then, 7 x + 7√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
2 × 2 + 3, 7 × 2 + 6, 20 × 2 + 9, 49 × 2 + 12, 110 × 2 + 15, 235 Hence, x= 49 Hence, 7 x + 7√x = 7 × 49 + 7√49 = 343 + 7 × 7 = 343 + 49 = 392
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