Quantitative Aptitude - Arithmetic Ability Questions

The average age of 27 students of a class is 22. If the age of the teacher is also added to their ages, then the average increases by one. Find the age of the teacher.

Three consecutive natural numbers are such that the square of the greatest is greater than the product of the other two by 19. The smallest of these numbers is

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

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

Choose the odd word/letters/number/number pair from the given alternatives.

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

Find the unit place digit in 192102 + 193103