On a certain sum of money, compound interest earned at the end of three years = Rs. 1456. Compound interest at the end of two years is Rs. 880. Compute the principal invested.

A boss decides to distribute Rs. 2000 between 2 employees. He knows X deserves more that Y, but does not know how much more. So he decides to arbitrarily break Rs. 2000 into two parts and give X the bigger part. What is the chance that X gets twice as much as Y or more?

What is the ratio in which water should be mixed with a coke concentrate costing Rs 15/litre to make a profit of 30% by selling the resultant drink at Rs 18/litre?

A milkman purchases milk at Rs 20/litre and mixes 4 litres of water in it. By selling the resultant mixture at the rate of Rs 20/litre, he earns a profit of 40%. The amount of mixture he had with him to sell was

There are 3 sets with multiples 7, 6 and 4. All multiples are less than 560, also consider only odd multiples of 7. What is total elements in

A tank of capacity 60 litres can be filled in 10 minutes by a pipe P. Another pipe Q placed at the bottom of tank can empty the tank in 30 minutes. Both of the pipes were opened. In how much time pipe Q will empty the tank if pipe P is closed after 10 minutes?