Quantitative Aptitude - Arithmetic Ability Questions

Calculate the ratio of the area of two similar triangles if the sides of the triangles are in the ratio of 9:4.

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

The simple interest on a sum for 5 years is two­fifth of the sum. The rate of interest per annum is

The length of a chord which is at a distance of 5cm from the centre of a circle of radius 13cm is

The successive discount of 15%, 20% and 25% on an article is equivalent to the single discount of

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?

 In ΔDEF measure of angle E is 90 deg. If tanD = 4/3, and DE = 6cm, then what is the length (in cm) of side EF?