Quantitative Aptitude - Arithmetic Ability Questions

If the product of two numbers is 4941 and their LCM is 81, then their HCF is :

A solid sphere has a radius 21 cm. It is melted to form a cube. 20% material is wasted in this process. The cube is melted to form hemisphere. In this process 20% material is wasted. The hemisphere is melted to form two spheres of equal radius. 20% material was also wasted in this process. What is the radius (in cm) of each new sphere?

A certain sum of money triples itself in 5 years at simple interest. In how many years it will be five times?

18 men or 36 boys working 6 hours a day can plough a field in 24 days. In how many days will 24 men and 24 boys working 9 hours a day plough the same field ?

Parimal has done 1/4th of a job in 10 days, Salim completes the rest of the job in 20 days. In how many days can they together do the job?

A shopkeeper by selling 5 items, earns a profit equal to the selling price of 1 item. What is his profit percentage?

If 35% are the passing marks. A student gets 200 marks yet fails by 24 marks. What is the maximum marks?

Two numbers whose sum is 84 can not be in the ratio