Quantitative Aptitude - Arithmetic Ability Questions

Select the odd letters from the given alternatives.

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

The radii of two concentric circles are 68 cm and 22 cm. The area of the closed figure bounded by the boundaries of the circles is

The slopes of two lines are 1 and √3. What is the angle between these two lines?

What is the value of sin 5π/3?

If sec -5π/4 = x, then the value of x is

What is the value of sec 330°?

A 1.6 m tall observer is 45 meters away from a tower. The angle of elevation from his eye to the top of the tower is 30°, then the height of the tower in meters is