Quantitative Aptitude - Arithmetic Ability Questions

If the sum of squares of two real numbers is 41 and their sum is 9. Then the sum of cubes of these two numbers is

Which of the following will yield a recurring decimal?

A, B and C can do a job working alone in 12, 16 and 24 days respectively. In how many days they can do the job if they worked together?

The standard deviation of the set {10, 11, 12, 9, 8} is

In the following question, select the odd word pair from the given alternatives.

What is the ratio of radius of incircle and circumcircle for an equilateral triangle with an area of 22√3 sq. units?

The sum of the parallel sides of a trapezium is 12.4 cm. If the distance between the parallel sides is 3.5 cm, what is the area of this trapezium?

2sin[(C+D)/2].cos[(C­-D)/2] is equal to