Quantitative Aptitude - Arithmetic Ability Questions

What will be the roots of the quadratic equation x2 - 25x + 156 = 0?

If cos3A = X, then value of X?

What is the value of 23+5252-23 ?

The height of a tower is 300 meters. When its top is seen from top of another tower,then the angle of depression is 60°. The horizontal distance between the bases of the two towers is 120 metres. What is the height (in metres) of the small tower?

The cost price of an article is x. It is marked up by 150%. It is sold at Rs 600 after giving 40% discount. What is x (in Rs)?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Sowing, Irrigation, Hoeing, ?

Two pipes X and Y can fill an empty tank in 16 hours and 20 hours respectively. Pipe Z alone can empty the completely filled tank in 25 hours. Firstly both pipes X and Y are opened and after 6 hours pipe Z is also opened. What will be the total time (in hours) taken to completely fill the tank?

The reciprocal of the sum of the reciprocals of 8/7 and 5/6 is: