Our opening quote contended that Venn diagrams are overrated. Even those who agree must admit that they have a curious allure ...

Venn diagrams are used to sort sets of data. The probability of an event not happening uses the complement of the region on the Venn diagram. Count the number of elements in each region.

The lowest common multiple (LCM) of two or more numbers can be found using the union of sets. For this it is important to know about common factors. The Venn diagram shows the number of people in ...