Quantitative Aptitude - Arithmetic Ability Questions

What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?

The mean of marks secured by 50 students in division A of class X is 61, 25 students of division B is 57 and that of 50 students of division C is 55. What will be the mean of marks of the students of three divisions of Class X?

Lokesh starts a business with Rs 240000. After 3 months Vishal joins him with Rs 210000. At the end of the year what will be the ratio of their profit?

When a discount of 50% is given on a shirt, the profit is 25%. If the discount is 10%, then the profit is

What will be the roots of the quadratic equation x2 - 25x + 156 = 0?

Which of the following is not a quadratic equation?

Find the odd one out.

If a merchant offers a discount of 25% on the list price, then he makes a loss of 5%. What % profit or % loss will he make if he sells at a discount of 10% of the list price?