12 pumps working 6 hours a day can empty a completely filled reservoir in 15 days. How many such pumps working 9 hours a day will empty the same reservoir in 12 days?

If Rs 1380 is divided into A, B and C in such a way that A gets 5 times B's share and 3 times C's share. Then what is the value of C parts?

In a college the number of students studying Arts, Commerce and Science are in the ratio of 3:5:8 respectively. If the number of students studying Arts, Commerce and Science is increased by 20%, 40%, and 25% respectively, what will be the new ratio of students in Arts, Commerce and Science respectively?

Three vessels whose capacities are in the ratio of 3: 2: 1 are completely filled with milk mixed with water. The ratio of milk and water in the mixture of vessels are 5: 2, 4: 1 and 4: 1 respectively. Taking 1/3 of first, 1/2 of second and 1/7 of third mixtures, a new mixture kept in new vessel is prepared. The percentage of water in the new mixture is 

Study the following graph to answer these questions :
Percent profit earned by two companies A & B over the years.
Profit = Income – Expenditure

Expenditure of Company B in years 1996 and 1997 were in the ratio of 5:7 respectively. What was the respective ratio of their incomes?

There is 40 % increase in an amount in 8 years at simple interest. What will be the compound interest  (in rupees) of Rs 30000 after 2 years at the same rate? 

Direction : What should come in place of the question (?) in the following question.

35% of 430 + ? % of 360 = 276.5

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 9 % per anmum is Rs . 405 The sum is