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Hello there.

This is Numberphile. We mainly post videos about mathematics and just numbers in general.

Cones are MESSED UP

Cones are MESSED UP

Featuring Ben Sparks.

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Ben Sparks: https://www.bensparks.co.uk

More Ben Sparks on Numberphile: http://bit.ly/Sparks_Playlist

Thanks to Katie Steckles and Lisa Mather for building the (semi) sealed martini glass

The Foundation of Mathematics

The Foundation of Mathematics

Tetrahedral Numbers

Tetrahedral Numbers