What is the biggest orange?

Six students had an orange eating contest. The graph shows the number of oranges eaten by each student. Mary ate the fewest oranges and Jack ate the greatest. How many more oranges did Jack eat than Mary? Answer: ............. oranges

A shool has 24 classes and there are 40 students in each class. 1/8 of the students wear glasses and 1/12 of those who wear glasses are boys. How many schoolgirls wear glasses in the schoool?