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Crossing the Bridge

Four friends must cross a bridge. How can they all cross it in just 17 minutes?

Coins

A man has 5 coins in his pocket. Given the clues, can you work out what the coins are?

Colouring Curves Game

In this game, try not to colour two adjacent regions the same colour. Can you work out a strategy?

Flow Chart

Age 11 to 14 Challenge Level:
Use a table of values to keep track of M, D and N as they change.