The following line graph gives the percentage of the number of candidates who qualified an examination out of the total number of candidates who appeared for the examination over a period of seven years from 1994 to 2000.

The difference between the percentage of candidates qualified to appeared was maximum in which of the following pairs of years?

P, Q and R can finish a work in 5 days, 10 days, and 15 days, respectively, working alone. P and Q works on first day, P and R works on second day and P and Q works on third day and son on till the work is completed. In how many days the work will be completed?

A trader bought 120 kg of potato at 24/kg. He sold 80 kg of it at 50% profit and the balance at 25% low. Find the total profit or loss? 

Tapas works twice as fast as Mihir. If both of them together complete a work in 12 days, Tapas alone can complete it in 

The difference between the interior and exterior angles at a vertex of a regular polygon is 150°. The number of sides of the polygon is

Directions: The Bar Graph given here shows the population (in crores) of India in various census years. Observe the graph and answer the question based on it.  

The percent increase in population from 1971 to 1981 is 

1200 soldiers in a fort had enough food for 28 days. After 4 days, some soldiers left the fort. Thus, food lasted for 32 more days. How many soldiers left?