Quantitative Aptitude - Arithmetic Ability Questions

If three numbers are in the ratio 2 : 3 : 5 and the twice their sum is 100. Find the square of the largest of the three numbers.

Of the 5 numbers whose average is 76, the first is 3/7 times the sum of other 4. The first number is

If a -­ b = 3 and ab =28, then a3 - b3 is

The radius of a sphere and hemisphere are same. The ratio of their total surface area is

Pankaj has done 1/2 of a job in 12 days, Sainath completes the rest of the job in 6 days. In how many days can they together do the job?

What is the value of sin 75°+ sin 15°?

A line passing through the origin perpendicularly cuts the line 3x - 2y = 6 at point M. Find M?

If the radius of a circle is increased by 16%, its area increases by