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# News

## February 2013

In this month's News you will find:

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Two new cameos this month.
• Knight Protectors is a logic puzzle using the movements of a chess knight. The challenge is simply stated - to place 12 knights so that every square of an 8 x 8 board is either occupied or protected by the knights. It can be a difficult challenge, but when the solution is found it is a beautiful example of rotational symmetry. What happens if the size of the board is changed?
• 64 = 65 is one of a genre of 'missing square' puzzles. It appears that the same 4 jigsaw pieces can make a square of area 64 and a rectangle of area 65. This can't be true, so how can the paradox be explained? At different levels, students can select different mathematical tools to prove where the extra square is and even to show that it's area must be one square unit. The task also opens the door to a study of Fibonacci numbers.

Click a photo to access its cameo, or access all current cameos through the Link List below.

Keep smiling,
Doug.

• Did you miss December/January News?
If so you missed information about:
1. Points of View discounted
2. 2013 Maths300 PD
3. Fractions in a Fraction of the Time (PD)
4. Maths With Attitude & the Australian Curriculum
5. Revision and expansion of Make A Snake cameo
6. ...and more...

### Did You Know?

Previous News

Continue exploring our history back to July 1992 through the Sense of History link.