Question

The following expressions form a series followed by a (?). Find the odd one out first and then find that what will come in place of the question mark (?) according to the corrected series? (x - 10), (x + 10), 120, x(x - 10), 4500, (1540 × x), ? Also, 'x' = positive root of x2 - 6x - 720 = 0

Q: Answer-The following expressions form a series followed by a (?). Find the odd one out first and then find...

Given, x2 - 6x - 720 0 Or, x2 - 30x 24x - 720 0 Or, xx - 30 24x - 30 0 Or, x - 30x 24 0 So, x 30 or x -24 So, x 30 So, x - 10 20 x 10 40 x - 10 x 20 30 600 1540 x 1540 30 46200 So, the series becomes 20, 40, 120, 600, 4500, 46200, The series follows the pattern as 20 2 40 40 3 120 120 5 600 600 7 4200 4200 11 46200 So, 4200 should come in place of 4500. And, 46200 13 600600 Or, 600600 30 20020 x