Quantitative Aptitude - Arithmetic Ability Questions

In a right angled triangle, the hypotenuse is 4 cm longer than the perpendicular which is 4 cm longer than the base. Calculate the length of hypotenuse.

What is the fraction which, when taken away from 1/2, gives 2/3?

The angle of depression of the foot of a building from the top of a tower 30 m away is 30 deg. How high is the tower?

In a triangle the length of the side opposite the angle which measures 60° is 15 cm, what is the length of the side opposite to the angle which measures 90°? 

The angle of elevation of an aeroplane from a point on the ground is 60 deg. After flying for 30 seconds, the angle of elevation changes to 30 deg. If the aeroplane is flying at a height of 4500 m, then what is the speed (in m/s) of aeroplane?

125 - 73 + 48 - 137 + 99 = ?

In a triangle, one of the angles is three times the smallest and another is two times the smallest angle. Calculate the smallest angle.

What is the square root of 576?