## Thursday, April 5, 2012

### phyllotaxis multiplication colouring pages

I thought I would try to make some printable colouring pages of phyllotaxis spirals - thinking that they could be coloured-in using multiplication-table / skip-counting rules to make patterns like the ones shown in the previous post. I've put a two-page pdf here - page one has a spiral with the numbers filled in (as above), and page two has one without numbers (for unfettered colouring).

When colouring these in, you might just shade the multiples of five - and get the picture below.

As you colour, you'll see the spiral pattern formed by the sequence 5, 10, 15, ...

You also can't avoid noticing a radial pattern as the dots seem to line out on spokes pointing out from the center. Take a closer look at that, and you'll see that adjacent numbers on the radial arms always have a difference of 55. Neato! this was something I didn't see when I generated the same pattern via software - using a pencil slows things down a bit and helps you notice things.

I'm wondering what relationships might be found in the patterns that other multiplicative colouring rules produce.

*  *  *

Postscript: I shouldn't have been surprised! Any time you make a number spiral skip-counting by n with k spokes, the difference along the spokes is going to be nk - in this case, skip counting by 5 and generating 11 spokes gives a radial difference of 55.

#### 2 comments:

1. Ho, Is there anywher you know o\f I can get a big poster of the Multiplication table Rainbow for my Grade 2 son who is studying maths & just stratiung out on his naths journey- as your post says -it is a great table to use. My email is petvetcw@ optusnet.com.au
I'd be most grateful for any links you could send me. You are an inspiration for the next generation, Thankyou, Cedar (mum to a Grade 2 Boy)

1. Thanks - I would recommend making your own poster. Creating a large multiplication table with chart paper and colouring it in would be a good learning activity; just having a version printed off on the wall would not be as engaging.