Quantitative Aptitude - Arithmetic Ability Questions

If the standard deviation of a population is 4.5, what would be the population variance?

What is the equation of the line if its slope is 1/4 and y-­intercept is ­-3?

The difference between the greatest and least five­ digit numbers formed by the digits 2,5,0,6,8 is (repetition of digits are not allowed)

If (x + y)/z = 2, then what is the value of [y/(y – z)] + [x/(x – z)]?

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.

The volume of a right circular cone, whose radius of the base is same as its altitude, and the volume of a sphere are equal. The ratio of the radius of the cone to the radius of the sphere is

The cash difference between the selling price of an article at a profit of 2% and 16% is Rs.3. The ratio of two selling prices is

T is a point on the common tangents at P of two circles and if TA and TB are resectively the other tangents at A and B to the two circles drawn from the point T then