Quantitative Aptitude - Arithmetic Ability Questions

Three cubes of iron whose edges are 6cm, 8cm and 10cm respectively are melted and formed into a single cube. The edge of the new cube formed is

If the standard deviation of a population is 7, what would be the population variance?

What is the difference (in Rs) between compound interest (compounded annually) and simple interest for 3 years on a principal of Rs 4000 at the rate of 30% per annum?

What is the measure of an interior angle of a regular dodecagon?

Dinesh purchases 10 dozens of apples at the rate of Rs 180 per dozen. He sold each one of them at the rate of Rs 19.5. What is the profit (in percentage) of Dinesh?

The product of two numbers is 0.324. One of the numbers is 1.2. What is the other number?

Find the sum of first 8 odd prime numbers.

Find the total surface area (in cm2) of a right circular cone of diameter 21 cm and slant height 11 cm.