Quantitative Aptitude - Arithmetic Ability Questions

If a+1a=1,then the value of a2-a+1a2+a+1 is a≠0

The perimeter and the breadth of a rectangle are 44 cm and 10 cm respectively. Find its area (in cm2).

A solid sphere and a solid hemisphere have the same total surface area. The ratio of their volumes is (Take, π=22/7)

ABCD is a trapezium in which AB is parallel to CD and AB = 4(CD). The diagonals of the trapezium intersects at O. What is the ratio of area of triangle DCO to the area of the triangle ABO?

The least number that must be substracted from 63520 to make the result a perfect square is

Expand : S + 23

For what value of X, 211X will be a perfect square?

What is the difference (in Rs) between compound interest (compounded annually) and simple interest for 3 years on a principal of Rs 3000 at the annual rate of 20%?