Quantitative Aptitude - Arithmetic Ability Questions

The mean height of 25 boys in a class is 150 cm, and the mean height of 35 girls in the same class is 145 cm. The combined mean height of 60 students in the class is ___ (app)

The price of a product after getting 20% discount is Rs 3,024 which includes 5% tax on selling price. What was the marked price (in Rs) of the product?

If pq(p+q) = 1, then the value of 1p3q3-p3-q3 is equal to

Travelling at 4/5th of his usual speed, a man is 15 minutes late. What is his usual time to cover the same distance?

If a merchant offers a discount of 10% on the list price, then she makes a loss of 25%. What % profit or % loss will she make if she sells at a discount of 20% of the list price?

Two cars travel from city A to city B at a speed of 24 and 32 km/hr respectively. If one car takes 2.5 hours lesser time than the other car for the journey, then the distance between City A and City B is

M is thrice as good as workman as N and together they finish a piece of work in 30 days. In how many days will M alone finish the work?

Pinaki is 9 years younger than Bhaswati. Thirteen years hence Bhaswati will be 1.2 times as old as Pinaki. Find Pinaki's present age.