Quantitative Aptitude - Arithmetic Ability Questions

The total surface area of a hemisphere is 462 sq.cm. Find its diameter (in cm).

If the radius of the cylinder is decreased by 20%, then by how much percent the height must be increased, so that the volume of the cylinder remains same?

The chord AB of a circle of centre O subtends an angle θ with the tangent at A to the circle. Then measure of∠ABO is

If 8 men can do a piece of work in 14 days, then in how much time (in days) will 7 men do the same piece of work?

4 men can build a small house in 12 days. How long would it take for 6 men to build the same house?

The average of 12 numbers is 9. If each number is multiplied by 2 and added to 3, the average of the new set of numbers is

If the simple interest on a sum of money for 2 years at 5% per annum is Rs. 50, the compound interest on the same at the same rate and for the same time is:­

How many diagonals are there in octagon?