A combination mechanism for a safe comprises thirty-two tumblers
numbered from one to thirty-two in such a way that the numbers in
each wheel total 132... Could you open the safe?
Do Unto Caesar
Age 11 to 14 Challenge Level:
In Poker the total money in the game doesn't change, just the
distribution between the players. What fraction of that total does
each player have at the start and at the finish? They can't all be
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the
NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to
embed rich mathematical tasks into everyday classroom practice.