Quantitative Aptitude - Arithmetic Ability Questions

If PQ and PR be the two tangents to a circle with centre O such that ∠QPR = 120° then ∠POQ is

The simple and compound interest that can be earned in two years at the same rate is Rs 1500 and Rs 1575 respectively. What is the rate (% per annum) of interest?

The simplification value of 735+2-552+7+227+5 is

A, B and C are employed to complete a work in Rs. 784. If A and B together complete 23/28 of the work. Calculate the wages (in Rs.) paid to C?

Josna takes 4 hrs 30 min in walking a distance and riding back to some place where she started. She could walk both ways in 5 hrs 40 min. The time taken by her to ride back both ways is

A sphere of radius 5 cm is melted to form a cone with base of same radius. The height (in cm) of the cone is

x, y and z are real numbers. If x3 + y3 + z3 = 13, x + y + z = 1 and xyz = 1, then what is the value of xy + yz + zx?

What should be added to 8(3x - ­4y) to obtain 18x ­- 18y?