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Jluuis or Even Asutguus?
Age 16 to 18
Challenge Level 
This challenge cipher forms part of a very difficult sequence of ciphers suitable for keen groups or individuals, maths clubs and very optional homework challenges. Don't try this in the classroom!
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Snooker
A player has probability 0.4 of winning a single game. What is his probability of winning a 'best of 15 games' tournament?
Snooker Frames
It is believed that weaker snooker players have a better chance of winning matches over eleven frames (i.e. first to win 6 frames) than they do over fifteen frames. Is this true?
Magic Caterpillars
Label the joints and legs of these graph theory caterpillars so that the vertex sums are all equal.