Who said that adding, subtracting, multiplying and dividing
couldn't be fun?
Can you find a reliable strategy for choosing coordinates that will locate the robber in the minimum number of guesses?
A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.
A game in which players take it in turns to choose a number. Can you block your opponent?
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.