Quantitative Aptitude - Arithmetic Ability Questions

In the given figure,PQ = PS = SR and QPS = 40 deg, then what is the value of QPR (in deg) ?

Deepak sells all his goods available in his shop at the cost price, but he cheats his customer and gives 20% less goods as he should give. Find his % profit.

Rakesh’s present age is 36 years. If 12 years ago, Deepak’s age was one-fourth of Rakesh’s age, then after 27 years what will be the age (in years) of Deepak?

Of the four numbers whose average is 91, the first is 3/10 times the sum of other three. The first number is:

A is twice as good as B and together they finish a piece of work in 16 days. The number of days taken by A alone to finish the work is

Triangle PQR is inscribed in the circle whose radius is 14 cm. If PQ is the diameter of the circle and PR = 10 cm, then what is the area of the triangle PQR?

If 9x2 + 16y2 = 60 and 3x + 4y = 6, then the value of xy is

If x - y = 6 and xy = 40, then find x2 + y2 ?