Odd and even numbers

problem
Odds and evens

Age

11 to 14

Challenge level

Are these games fair? How can you tell?
problem
Odds, evens and more evens

Age

11 to 14

Challenge level

Alison, Bernard and Charlie have been exploring sequences of odd and even numbers, which raise some intriguing questions...
problem
Magic letters

Age

11 to 14

Challenge level

Charlie has made a Magic V. Can you use his example to make some more? And how about Magic Ls, Ns and Ws?
game

FEMTO

Age

14 to 16

Challenge level

A new card game for two players.
game

FEMTO: follow up

Age

14 to 16

Challenge level

Follow-up to the February Game Rules of FEMTO.