Use Venn diagrams to illustrate data in a logical way which will enable you to see groupings and sets clearly.

This paper describes the use of a three-circle Venn diagram as a vehicle for introducing pre-service elementary teachers to pedagogical content knowledge (PCK). Each circle of the diagram represents ...

Solve problems using Venn diagrams You may be asked to solve problems using Venn diagrams in your exam. It is really important you draw the Venn diagram and add information as you go along.