Quantitative Aptitude - Arithmetic Ability Questions

A boy running at 10/9 th of his actual speed covers 39 km in 2 hours 20 minutes and 24 seconds. Find the actual speed of the boy (approx.)

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is :

What is the rate of interest if simple interest earned on a certain sum for the 3rd year is Rs 1,750 and compound interest earned for 2 years is Rs 3622.5?

The selling price of an item inclusive of a 10% profit was Rs.440. What would be the percentage loss if the item was sold for Rs. 370?

A, B and C invest to start a restaurant. The total investment was Rs 3 lakhs. B invested Rs 50,000 more than A and C invested Rs 25,000 less than B. If the profit at the end of the year was Rs 14,400 then what is C's share of the profit (in Rs)?

If x = 3+13, then the value of x-12642x-1x-233 is

If x - y = -9 and xy = -20, then find x2 + y2 ?

If the shopkeeper sells an item at Rs 1250 which is marked as Rs 1500, then what is the discount he is offering?