There is a class of 46 students in all.
a) Suppose at least six students are required to form a sports team. How many sports team can there be at most? (Answer: 7)
b) Suppose the class is going out on a field trip. Assume that the teacher drives her own car. Each travelling-car can hold six students. How many travelling-cars will thus be needed? (Answer: 8)
c) For every two travelling-car, there must be a fire extinugisher. Hence, how many fire extinguishers are needed for all the travelling-cars on this field trip? (Answer: 4)