Quantitative Aptitude - Arithmetic Ability Questions

If [√(a2 + b2 + ab)] + [√(a2 + b2 – ab)] = 1, then what is the value of (1 – a2 )(1 – b2 )?

Coefficient of x2 in (x + 7)(5 - 3x)(3x - 6) is

Expand and simplify (x + 4)2 + (x -­ 2)2

If sin ­-330° = x, then the value of x is

The angles of depression of two ships from the top of a light house are 45° and 30° toward east. If the ships are 200m apart, the height of the light house is (take √3=1.73)

On selling 56 chairs, Mohan earns profit equal to the selling price of 6 chairs. What is the profit percentage?

If 14.35 - (1.956 - x ) - 83.92 = 3.858 then what is the value of x?

Which of the following is correct?