Quantitative Aptitude - Arithmetic Ability Questions

What is the equation of the line passing through the point (0,­4) and making an angle of ­45° with the positive x­axis?

cosA/(1 -­ sin A) is equal to

If cot 240° = x, then the value of x is

What is the perimeter of the sector whose central angle is 60° and radius of the circle is 21 cm?

Find the value of 'a' for which x+3x+a24 is a perfect square.

In a class consisting of boys and girls, there are 45 students. If three fifth of the students are boys, find the number of boys in the class.

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

Ms. Alina borrowed Rs.650 at 6% per annum simple interest. What amount will she pay to clear her debt after 4 years?