### Have You Got It?

Can you explain the strategy for winning this game with any target?

### Traffic Lights

The game uses a 3x3 square board. 2 players take turns to play, either placing a red on an empty square, or changing a red to orange, or orange to green. The player who forms 3 of 1 colour in a line wins.

### Yih or Luk Tsut K'i or Three Men's Morris

Some puzzles requiring no knowledge of knot theory, just a careful inspection of the patterns. A glimpse of the classification of knots and a little about prime knots, crossing numbers and knot arithmetic.

# Matching Fractions Decimals Percentages

##### Stage: 2 and 3 Challenge Level:
Match the cards with the same value.
Keep an eye on your score - ending at around 400 would be an excellent score.

Full Screen Version
This text is usually replaced by the Flash movie.

To download a printable version of this game, use the links below. There are three sets - set A are the easiest and set C are the most difficult.

If you print double sided, then the cards will have an NRICH logo on the back. Otherwise, you can just print the first page.

PDF: Set A, Set B, Set C

Word: Set A, Set B, Set C