Quantitative Aptitude - Arithmetic Ability Questions

If (x + y)/z = 2, then what is the value of [y/(y – z)] + [x/(x – z)]?

If cosec 45° - sin 30° = x, then x is

If the standard deviation of a population is 7, what would be the population variance?

If a3 + a - 1 = 0 then find the value of a6 + a4 + a - 2

32% of a number exceeds 17% of the same number by 120. What is the value of the number?

A girl walking at the speed of 2 km/hr covers a certain distance in 7 hours 30 minutes. If she covers the same distance by cycle in 5 hours, then what is the speed (in km/hr) of cycle?

The square root of 5776 is

The co-ordinates of the centroid of a triangle ABC are (2 , 2). What are the co-ordinates of vertex C if co-ordinates of A and B are (7 , -1) and (1 , 2) respectively?