Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 1+aa1/2+a-1/2-a1/2+a-1/21+a+a-1/2 ?

A cuboid has dimensions 8 cm x 10 cm x 12 cm. It is cut into small cubes of side 2 cm. What is the percentage increase in the total surface area?

Find the odd word/letters/number from the given alternatives.

Rs. 782 is divided into 3 parts in the ratio 12:23:34, the first part is 

In the given figure, PQR is a triangle and quadrilateral ABCD is inscribed in it. QD = 2 cm, QC = 5 cm, CR = 3 cm, BR = 4 cm, PB = 6 cm, PA = 5 cm and AD = 3 cm. What is the area in sq.cm of the quadrilateral ABCD?

In which of the following quadrilaterals both pairs of opposite sides are parallel?

If cot A = n/(n + 1) and cot B = 1/(2n + 1), then what is the value of cot (A + B)?

G is the centroid of ΔABC. If AG = BC, then measure of ∠BGC is