Quantitative Aptitude - Arithmetic Ability Questions

Find the area (in sq.cm) of a semi-circle of radius 14cm.

A, B and C can finish a job working alone in 72, 24 and 36 days respectively. In how many days they can finish the job if they worked together?

If a3 + b3 + c3 - 3abc = 0, then the value of a2/bc + b2/ac - 3.

The number of students in a class is increased by 20% and the number now becomes 66. Initially the number was

If the length of the shadow of a vertical pole be √3 times the height of the pole, the angle of elevation of the sun is:­

In a fraction when 3 is added to its numerator and denominator it becomes 4/5. And it becomes 1/2 when 2 is subtracted from both the numerator and denominator. Find the fraction.

How much does one need to add to 2/3 to obtain 3/2?

If PA and PB are two tangents to a circle with centre O such that ∡APB = 80°. Then ∡AOP =