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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.

Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?

After playing 500 games, my success rate at Solitare is 49%. How many games do I need to win to increase my success rate to 50%?

Here are two games you can play. Which offers the better chance of winning?

This problem explores the range of events in a sports day and which ones are the most popular and attract the most entries.

In a league of 5 football teams which play in a round robin tournament show that it is possible for all five teams to be league leaders.