Quantitative Aptitude - Arithmetic Ability Questions

What is the average of first 19 odd numbers?

After deducting 12% from a certain sum and then deducting 25% from the remainder, 2508 is left, then what is the initial sum?

A shopkeeper by selling 21 items earns a profit equal to the selling price of 1 item. What is his profit percentage?

If the average age of 20 students in Class-I is 10 years and average age of 25 students in Class II is 12 years, find the average age (in years) of all students.

In the following question, select the odd word from the given alternatives.

If a : b = c : d = 1 : 6, then what is the value of a2+c2b2+d2?

The average of three consecutive odd numbers is 52 more than 1/3rd of the largest of these numbers. What is the smallest of these numbers?

The age of Ravi is twice the age of Prakash and three times the age of Kumar. If the age of Prakash is 24 years, then what will be the age of Kumar after 4 years ?