Learn how to draw and interpret Venn diagrams with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

A Venn diagram is an illustration that uses overlapping circles to show commonalities and differences between things or groups of things.

Yes, yes, Venn diagrams can teach math and business concepts and management lessons. It turns out they are also really excellent as Internet punchlines.

Venn had initially used diagrams developed by the Swiss mathematician Leonard Euler to show some relationships between sets, which he then developed into his famous Venn diagrams.