Data Interpretation Questions

The given line graph shows the record of the number of tickets sold at the theatre counter on the first $6$ days of a show. On how many days was the number of tickets sold less than that sold on the previous day?

The given bar graph shows the number of employees working in $6$ departments of a company. What is the difference between the number of employees of Department E and Department C?

A student enrolls for a $6$ test series for an entrance exam. He plots his progress as a line graph. The line graph shows the marks he scored in these $6$ tests. In how many tests was his name listed in the Hall of Fame? (Those students who score more than $40$ get the honor of being listed in the Hall of Fame)

The bar graph shows GDP for the year 2017, in billion USD, of six countries which have united to form a free trade block. GDP of which country constitutes $\frac{1}{5}$ th of the total GDP of these $6$ countries?