Quantitative Aptitude - Arithmetic Ability Questions

Simple interest on a certain sum of money for 3 years at 10% per annum is half the compound interest on Rs 6000 for 2 years at 10% per annum. The sum placed on simple interest is

A man covered a certain distance by a train running at the speed of 50 km/hr and covers the same distance back by walking at the speed of 5 km/hr. Ifthe whole journey took 5 hours 30 minutes, then what was the distance (in km) of one side?

If cosAcotA/(1 -­ sinA) = x, then the value of x is

What is the value of xy if x - y = 3 and x2+y2=15?

The price of an article is discounted by 25%, to restore to its original value, the new price must be increased by

If x2 – 4x + 1 = 0, then what is the value of x9 + x7 – 194x5 – 194x3?

If 3x ­- 2(4 ­- 3x) < 2x ­- 5 < 3x + 3; then the value of x is