Quantitative Aptitude - Arithmetic Ability Questions

Choose the one which is different or odd from the following options?

If x = (a/b) + (b/a), y = (b/c) + (c/b) and z = (c/a) + (a/c), then what is the value of xyz – x2 – y2 – z2?

The rate of simple interest per annum at which a sum of money double itself in 162⁄3 yrs. is

The lengths of two diagonals of a rhombus are 24 cm and 32 cm. What is the side (in cm) of the rhombus?

The chord AB of a circle of centre O subtends an angle θ with the tangent at A to the circle. Then measure of∠ABO is

If ax - 4y = -6 has a slope of -3/2. What is the value of a?

If the volumes of two right circular cones are in the ratio 1:4 and their diameters of bases in the ratio 4:5, then their heights will be in the ratio:

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