A Venn diagram of items that are both "musical" and "thrive in cold" Google Google is celebrating British logician John Venn's 180th birthday today with a Google Doodle game involving those fun ...

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

This is because a true Venn diagram doesn't just make sure everything overlaps with everything else. It has to represent every possible relationship. If you've got three sets of data -- A, B and C ...