In which year was the difference between the number of students in University- 1 and the number of students in University-2 the highest?

What was the percent increase in the number of students in University-1 in the year 2011 as compared to the previous year? 

If 25% of the students in univeristy-2 in the year 2010 were females, what was the number of male students in University-2 in the same year? 

What is the sum of the number of students in University-1 in the year 2007 and the number of students in University-2 in the year 2011 together?

What was the difference between the number of students in University-1 in the year 2010 and the number of students in University-2 in the year 2012?

What is the ratio of the cost of 1kg of apples from Ropar to the cost of 1kg. of grapes from Chandigarh?