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knots posts

Inca quipu numbers Activity

by David, 6 February 2020 | 0 comments

a lot of knotted strings all tied together.

People record numbers in lots of different ways. This method was used by the Inca people and many others who lived near the Andes Mountains of South America.

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Borromean zip ties Activity

by David, 31 July 2015 | 1 comments

the three ties are woven together.

Time to connect with a maths activity! Get hands-on to learn more about chains and ancient links.

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Impossible plait Activity

by David, 23 September 2014 | 0 comments

A piece of felt that is platited into itself

You will need Felt sheet Good scissors Cutting the felt Cut a rectangle of felt about 6 cm wide and 20 cm long. Fold the felt in half so the short sides match up. Make two cuts, equally spaced, coming in from the folded side. Stop cutting about 2 cm before you reach the short edges of the…

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Celtic knots Activity

by David, 3 June 2014 | 0 comments

A hole in the woven pattern.

For over a thousand years, people have been drawing intricate woven patterns known as Celtic knots. As we’re about to find out, there’s a lot of maths involved!

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