1. Quote of the month: "People who didn't need people needed people around to know that they were the kind of people who didn't need people" - Terry Pratchett

2. New quiz AQQ301 about a bicycles and tricycles

A group of students use either a bicycle or a tricycle to go to university.
Questions:
1. If the number N of students is 30 and the total number of wheels W is 80, how many students use a tricycle?
2. There must be general condition(s) between N and W to avoid impossible situations such as negative number of bicycle or tricycle.
How can you establish that conditions (example: W > 2N and/or W<Log(N))
Good luck and try to be among the first ones!