Study the following table carefully and answer the questions given below.

What was approximate percentage increase in the number of students in Commerce discipline from 2003 to 2004?

The sum of the HCF and LCM of two numbers is 680 and the LCM is 84 times the HCF. If one of the numbers is 56, the other is : 

Three pipes, A B and C, can fill a cistern in 12, 18 and 24 minutes, respectively. If all the pipes are opened together for 7 minutes, what will be the volume of the water that overflows as the percentage of the total volume of the cistern?

The average of five numbers is  27.  If one  number is excluded. The average becomes 25. The excluded number is

The ratio of working efficiency at X and Y is 3:7. Working together, they can complete the work in 15 days. They together worked for 7 days. Then, find the time taken by X to complete 60% at the remaining work.

If a² + a + 1 = 0 then the value of a⁹ is. 

A business Rs. 3500 Starts from, after 5 months B becomes his partner, after one year the profit between the two is divided in the ratio of 2: 3, then find the capital investment of B.

What is the HCF of 16, 72 and 28 ?