A, B and C gets a total wage of Rs.3600 if they work together. A and B gets a total wage of Rs. 2800 if they work together and A alone gets Rs.1600. Find the efficiency ratio of A, B and C  

How many natural numbers less than 1000 are divisible by 5 or 7 but not by 35?

If the speed of a boat in still water is 20 km/hr and the speed of the current is 5 km/hr, then the time taken by the boat to travel 100 km with the current is : 

If the price of petrol increases by 19% and Sunitha intends to spend only an additional 12 % on petrol, by what percent should she reduce the quantity of petrol purchased?

498 is 17 % less than a number then the number is: 

The three vertices of a parallelogram taken in order are (0, 1), (2, 3) and (4, 3) respectively, then the coordinates of the fourth vertex is – 

If a-b=1 and a³-b³=61, then the value of ab will be 

Study the table and answer the questions and give answer the following questions.

What is the overall average of marks in the four subjects in the year 2009?