This website was inspired by the MTBoS

with special thanks to Christopher Danielson and his Which One Doesn't Belong - A Shapes Book.

This is Which One Doesn't Belong?, a website dedicated to providing thought-provoking puzzles for math teachers and students alike. There are no answers provided as there are many different, correct ways of choosing which one doesn't belong. Enjoy!


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Blog Posts about WODB?

Chris Hunter General WODB Post
Steve Wyborney Imposter Sets
Alex Overwijk (grade 10 applied math)Day 1 Day 2 Day 3
Mary Bourassa Calculus
Tina Palmer Geometry
Jennifer Wilson Geometry
Beth Ferguson Graphs of Functions
Nora Greene Number Sets
Rachel Fruin Shapes
Bryan Anderson 3D Shapes
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