Quantitative Aptitude - Arithmetic Ability Questions

Qamar gained 16% on the resale of a used stereo. If he purchased the item for Rs. 1500, how much did he sell it for?

The sum of ages of 4 children born at intervals of 4 years each is 60. What is the age of the youngest child?

A map is drawn at a scale of 2 mm for 500 kms. Two places are marked at the distance of 3.6 mm; calculate the distance (in kms) between these two places?

a and b are irrational numbers such that a+b = q is a rational number; then a­b is

If the side of a square is increased by 20%, then what will be the percentage increase in its perimeter?

If cos2x + cos4x = 1, then tan2x + tan4x =

If 2x - 3 = 3x - 5, then the numerical value of (x - 3)2 is

If 493/29 = 17, then 4.93/0.0017 = ?