Quantitative Aptitude - Arithmetic Ability Questions

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 28090, and Rs 29775.4 respectively, what is the rate of interest?

The point where the 3 medians of a triangle meet is called

Working together, pipes A and B can fill an empty tank in 10 hours. They worked together for 4 hours and then B stopped and A continued filling the tank till it was full. It took a total of 13 hours to fill the tank. How long would it take A to fill the empty tank alone?

If a perfect square, not divisible by 6, be divided by 6, the remainder will be

A car takes 5 hours to cover 100 kms distance at a particular speed whereas another car takes 3 hours to reach a particular distance at the same speed. Find the distance.

What is the value of cos 4π/3?

If x + 1x = -2, then the value of x631 + 1x632?

What is the HCF of 36, 72 and 126?