Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
Can you find a reliable strategy for choosing coordinates that will locate the robber in the minimum number of guesses?
Can you visualise whether these nets fold up into 3D shapes? Watch the videos each time to see if you were correct.
How many moves does it take to swap over some red and blue frogs? Do you have a method?