[Guest]

Pentomino_puzzle.doc

[Guest]

I'm having trouble posting this. Here's the basic text:

The chessboard problem set me thinking.

One of my favourite problems in maths is the pentomino problem - getting all the different shapes made up of 5 squares into a 10 by 6 rectangle. I was given a plastic pentomino puzzle as a teenager, and I still have it. There are a lot of solutions - just how many I’m not sure.

Anyway, a lot has been written about pentominos, but I have never seen this one.….

Take a chess board and cut out the middle 4 squares, leaving 60 squares.

Which of the 12 different pentominos can you tessellate to fill the board?

I have done some good diagrams, but I don't know how to put them on this forum posting. Help, anyone?

Donjar

[random7]

"I have done some good diagrams, but I don't know how to put them on this forum posting. Help, anyone?"

If they are pictures (such as JPEG, GIF, etc.) you can upload them to ImageShack, and then after uploading them, using the "direct link" URL, you can then insert them into posts via the "Insert Image" tool, when writing your posts/threads.

Hope that helps,

random7

[bonanova]

Post images:

Open a new Reply and type in any text you want in the text entry box.

Look below the text box for the Browse button and click it.

Locate the image you want to upload and select it.

Click Upload. the image file name should appear in the Manage Current Attachments window.

Place your cursor in the text entry box where you want the image to appear.

Click on the image file name in the Manage Current Attachments window.

The code to display the image should appear in the text box.

Scroll down and click Preview Post.

Edit the text entry box content and repeat Preview until it's what you want.

Scroll down and click Add Reply.

Hope this helps.

- bn