Quantitative Aptitude - Arithmetic Ability Questions

Due to increase of k% in the side, the area of a square increases by 69%. What is the value of k?

Point P (-2, 5) is the midpoint of segment AB. Co-ordinates of A are (-5, y) and B are (x, 3). What is the value of x?

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?

If x -­ y = ­7 and x + y = 13, then x2 - y2 is

What is the area (in sq cm) of a rectangle if its diagonal is 51 cm and one of its sides is 24 cm?

In a test, Charan secured 54 marks that was also equivalent to obtaining 72% marks. How many marks was the test out of?

The LCM of 72 and 84 is:

What is the value of Cot 45° - (1/√3)Cosec 60°?