Quantitative Aptitude - Arithmetic Ability Questions

The point equidistant from the sides of a triangle is called

Find the sum of the measures all the interior angles of a polygon having 12 sides.

At what point does the line 3x + y = -6 intercept the x-axis?

The orthocentre of a triangle is the point where

The simple interest on a sum is 7/8 of the principal for 5 years. What is the rate (in percentage) of interest per annum?

If the standard deviation of a population is 4.5, what would be the population variance?

The area of the triangle whose vertices are given by (2,4), (-3,-1) and (5,3) is

In ΔABC measure of angle B is 90°. If cosecA = 13/12, and AB = 10cm, then what is the length (in cm) of side AC?