Quantitative Aptitude - Arithmetic Ability Questions

The value of k, for which the quadratic equation 4x2 + 4√3x + k = 0 has equal roots is

Select the missing number.

An angle is greater than its complementary by 20°. What will be the measure of the angle?

What must be the length (in cm) of the diagonal of a rectangle if its area and breadth are 120 sq.cm and 8 cm respectively ?

Two adjacent sides of a parallelogram are 21 cms and 20 cms. The diagonal joining the end points of these two sides is 29 cms. The area of the parallelogram (in sq.cms) is

In what ratio wheat costing Rs 17/kg mixed with another wheat costing Rs 12/kg to get a mixture costing Rs 13.5/ kg?

If the angles of a triangle are in the ratio of 2 : 5 : 8, then find the value of the largest angle.

The value of sec2θ + 2tanθcotθ - tan2θ is