Quantitative Aptitude - Arithmetic Ability Questions

Find the marked price if the selling price is Rs. 9250 and discount is 7.5%.

The average of three numbers is 40. First number is 4/3 of the third number. If third number is 20 less than second number, then what is the value of second number?

The rate of working of A and B are in the ratio of 2:3. The number of days taken by them to finish the work is in the ratio:

If the ratio of cost price and selling price be 10:11, then the profit percentage is

Present age of A is 2 times the present age of B. After 8 years the B's age will be 4 times of C's present age. If C celebrated his fifth birthday 9 years
ago, then what is the present age (in years) of A?

A sum fetched a total simple interest of Rs. 8100 at the rate of 6% per year in 9 years. What is the sum?

Mahmood can do a piece of work in 40 hours. If he is joined by Janaki who is 50% more efficient, in what time will they together finish the work?

What is the value of √121 + √12321 + √1234321 + √123454321?