Quantitative Aptitude - Arithmetic Ability Questions

A man starts walking at 6.30 a.m. and wants to cover a distance of 30km. His initial speed is 6 kmph and after covering three-fifth distance, he reduces his speed by 2 kmph. At what time will he complete his walk?

If two marbles are picked at random, what is the probability that either both are red or both are green?

Three solid spheres have their radii r1, r2 and r3. The spheres are melted to form a solid sphere of bigger radius. Then the radius of the new sphere is

What is the reflection of the point (5, -2) in the line y = -1?

The line passing through (-2,5) and (6,b) is perpendicular to the line 20x + 5y = 3. Find b?

Two whole numbers are such that the cube of first number exceeds the cube of second by 61 and the ratio of the numbers is 5:4. What is the value of larger number?

Three numbers are in Arithmetic Progression (AP) whose sum is 30 and the product is 910. Then the greatest number in the AP is

Calculate the area (in cm2) of a circle of radius 17.5 cm.