I thought it might be fun to share a set of problems on Möbius strips. These interesting objects have several surprising and wonderful properties, and best of all, they're very easy to make.

To make it more fun, try making your own Möbius strip and experiment with it.

- Cut a long strip of paper. You'll want it to be several cm across, and it should be much longer than its width.
- Bring the ends together to make a simple loop.
- Before attaching them together, add a single half-twist to one side of the strip (as in the image above).
- Enjoy your Möbius strip!

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## Comments

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TopNewestI have always seen this performed as a magic trick from my childhood. I was amazed. Later, I came to know about the secret from a children's magic book. In my college I have only learnt mathematics which is limited to electrical engineering. I want to know exactly which branch of mathematics deals with this types of shapes and twists. is it topology. I have never been formally introduced to this subject. an u suggest a good book.

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I don't know about topology beyond a lay understanding, but as a kid I read a book called One Two Three... Infinity and enjoyed it.

It talks about the Möbius strip, but then moves onto the topology twisting spaces in 4 dimensions. It also talks about other various subjects like infinite series, and the different types of infinity (\(\aleph _{0}, \aleph _{1}\), etc). It's written from a lay perspective though, you may be looking for a more serious exploration.

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I think it would be interesting too.but i have kind of problem with the questions which i should choose the correct answer(I mean i prefer to write the answer...)

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Narges, for some of these problems (especially 3 and 4), multiple choice was the only way to really make the questions work.

If I could ask, why do you like the other kind of questions more? Is it because you get multiple tries?

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oh,i feel ashame to say what is my problem.....but let me say;when i choose,it doesn't work!i click on the answer but nothing happen :- (

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Thanx, Dan. I will order for one right away.

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Hello there

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It's amazing shape in 3-D... one can iterate in single line without crossing. if cut in half, we get 2 mobius strips...

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