Quantitative Aptitude - Arithmetic Ability Questions

A and B can complete a task in 20 days, B and C can complete it in 30 days while C and A can do the same task together in 24 days. How many days will each of and C take to complete the task individually? 

Ramesh and Rahman can do a work in 20 and 25 days respectively. After doing collectively 10 days of work, they leave the work due to illness and Suresh completes rest of the work in 3 days. How many days Suresh alone can take to complete the whole work ?

If (x - 13)2 + (y - 4)2 = 0, then the value of y + xy - x ?

The sum of squares of three positive integers is 323. If the sum of squares of two numbers is twice the third, their product is

A sump is filled by three tankers with uniform flow. The first two tankers operating simultaneously fill the sump in the same time during which the sump is filled by the third tanker alone. The second tanker fills the sump 5 hours faster than the first tanker and 4 hours slower than the third tanker. The time required by the first tanker is:

If an equilateral triangle has side 12 cm, then what is the difference (in cm) between the circumradius and inradius?

The perimeter of a square is 30 cm. Find its area (in cm²).

An angle is greater than its complementary angle by 30°. Find the measure of the angle?