Quantitative Aptitude - Arithmetic Ability Questions

The length of the radius of a circle with centre O is 5 cm and the length of the chord AB is 8 cm. The distance of the chord AB from the point O is

A water tank has two holes. The 1st hole alone makes the tank empty in 3 min and 2nd hole alone makes the tank empty in 5 min. If water leaks out at a constant rate, how long in minutes does it take if both the holes together empty the tank?

In ΔDEF, G and H are points on side DE and DF respectively. GH is parallel to EF. If G divides DE in the ratio 3:2 and HF is 8 cm, then the length of DF is

An angle is 1/3 its supplementary angle. Find the measure of the angle?

What is the slope of the line perpendicular to the line passing through the points (­-4,5) and (3,­-2)?

The mean of the data 3, 10, 10, 4, 7, 10, 5 is

Find the number which is NOT a prime number.

If the length of the shadow of a vertical pole on the horizontal ground is √3 times its height, then the angle of elevation