8274 /www/nrich/html/content/id/8274/ 1 0000-00-00T00:00:00 <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0"><p style="text-align: center;"><mdo:image src="spiral%201.jpg"></mdo:image></p> <p>A spiral made from Cuisenaire rods. If you do not have any of these rods you can use the ones <a href="http://nrich.maths.org/4348">here.</a></p> <p>The rods go up in steps of $1$ in colours as shown above. Perhaps try thinking of odds and evens and stick to just evens or just odds.</p></mdoxml> 2 3 1 1 0 0 0