Quantitative Aptitude - Arithmetic Ability Questions

If x = 313- 3-13, then 3x3 + 9x value is

Direction: What should come in the place of question mark (?) in the following number series? 24, 25, ?, 41, -8, 73

In the question, two equations I and II are given. You have to solve both the equations and give answer

$$\begin{gathered} x2-11x+28=0 \\ y2-18y+81=0 \end{gathered}$$

If x -­ y = 7 and xy = 32, then value of (x2 + y2) is

If 2x + 6y = 3xy and 10x -­ 3y = 4xy, find x, y.

If (a + b)/c = 6/5 and (b + c)/a = 9/2, then what is the value of (a + c)/b?

A watch having marked price as Rs 8400 is sold for Rs 5040 after two successive discounts. If the first discount is 25% then what is the second discount percentage?

In the given figure, in a right angle triangle ABC, AB = 12 cm and AC = 15 cm. A square is inscribed in the triangle. One of the vertices of square coincides with the vertex of triangle. What is the maximum possible area (in cm.sq) of the square?