Quantitative Aptitude - Arithmetic Ability Questions

In ΔDEF measure of angle E is 90°. If cosD = 8/17, and DE = 16cm, then what is the length (in cm) of side DF?

If the population of a town increases by 25% in the first year and increases by 36% in the second year, then what is the average rate (in percentage)of increase in the population?

A person while buying a dress on sale spends Rs. 45 and saves Rs. 5, what is the percentage of his savings?

Expand and simplify (3x + 2)2*(4x -­ 3) -­ (2x3 - 9x2 + 12x -­ 24)

If √(1 + cot2A)/cotA = x, then the value of x is

If cosAcotA/(1 -­ sinA) = x, then the value of x is

Ramu can row 9 kmph in still water. It takes him twice as long to row up as to row down. Find the rate of stream.

If sin π/6 + sec π/6 = x, then x is