list Codebreakers Age 7 to 11 Can you crack the code, solve the puzzle and think like a mathematician? Have a go at one of our puzzles and send us your solution. list Tales of the unexpected Age 11 to 18 Challenge level Problems to astonish and amaze
list Codebreakers Age 7 to 11 Can you crack the code, solve the puzzle and think like a mathematician? Have a go at one of our puzzles and send us your solution.