Quantitative Aptitude - Arithmetic Ability Questions

cot2A + cos2A is equal to

A quadrilateral is inscribed in a circle. If the opposite angles of the quadrilateral are equal and length of its adjacent sides are 6 cm and 8 cm, what is the area of the circle?

Simplify: (213 x 213 + 187 x 187)

Akash is 3 times as good a workman as Baldev and therefore is able to finish a job in 40 days less than Baldev. Working together, they can finish it in _____.

A can do a work in 21 days and B in 42 days. If they work on it together for 7 days, then what fraction of work is left?

The sum of the ages of father and a son presently is 70 years. After 10 years, the son's age is exactly half that of the father. What are their ages now?

The point of intersection of all the three medians of a triangle is called its

What is the least number of complete years in which a sum of money put out at 40% annual compound interest will be more than trebled?