Here are five competitions you could enter.
Which one offers you the best chance of winning?
- You win a prize if you flip a fair coin and get twelve heads in a row.
- Our gardener has ranked her seven favourite plants in order. If you rank them in the same order, you win.
- Choose the top 4 from 10 famous pictures and put them in the right order to win.
- Throw five fair dice and get five sixes to win the first prize.
- You throw four ten-sided dice and win first prize if you get four sixes.
Click here for a poster of this problem.