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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.

Statement Snap

Age 7 to 14 Challenge Level:

You might like to take a look at the problem Satisfying Statements, as the game and the problem complement one another.

You'll need to know your number properties to win a game of Statement Snap... 

To play the game, you'll need to print and cut out this set of cards
This game works well for 2 to 4 players.

How to play
Shuffle the cards, and place them face down on the table.
Turn over two cards so that all the players can see them.
The object of the game is to find a number that satisfies the statements on both cards.

For example, if the cards said "A multiple of 6" and "A factor of 90" you could pick the number 30.

After ten seconds, everyone declares a number that satisfies both cards, and then the next round begins by turning over the next two cards.

There are a few different scoring options for the game:
  • Score a point if you find a number that satisfies both cards
  • Score a point if you think of the highest number that satisfies both cards
  • List as many numbers as you can that satisfy both cards, and then score a point for each one.
  • List as many numbers as you can, and then score a point for each number on your list that doesn't appear on anybody else's list.

Impossible pairs!
Sometimes there might not be any numbers that satisfy both statements! If this happens, you can replace one of the cards with a new one.

A Final Challenge
Once you have played the game a few times, click below to see a few questions to explore:

How many impossible pairs can you find?
Can you find a number that satisfies 3 cards? Or 4 cards? Or...?