Quantitative Aptitude - Arithmetic Ability Questions

If the perimeter of a semicircle is 36 cm, then find its area (in cm2).

An equilateral triangle ABC is inscribed in a circle of radius 20√3.
The centroid of the triangle ABC is at a distance d from the vertex A. What is d equal to ?

What is the value of 9991 x 10009?

Find the least number which must be subtracted from 18265 to make it a perfect square

If y=2-x1+x, then what is the value of 1y+1 + 2y+1y2-1 ?

A train 110 metres long is running with a speed of 60 kmph . In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going ?

A sum fetched a total simple interest of Rs. 7728 at the rate of 7% per year in 8 years. What is the sum?

Coefficient of x2 in 4x3 - 2x2 + 2x -­ 3 are