Quantitative Aptitude - Arithmetic Ability Questions

The average age of 30 boys in a class is 10 years. If the age of their teacher is also included, the average increases by one year. The teacher's age in years is

Instead of multiplying by 25, a student multiplies that number by 52 and gets 324 more than correct answer. Then that number is

If √(1 + cot2A) = x, then the value of x is

Find out the odd word/letters/number/number pair from the given alternatives.

At what point does the line 2x - 3y = 6 cuts the Y axis?

Reflection of the point (­1,4) in the x­axis is

Select the odd word from the given alternatives.

 In the triangle ABC, the internal bisector of angle A meets the side BC at D. If BD=7.5 cm and BC=9 cm. Then calculate the value of AB:AC.