Probability
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problemStage 5 cipher challenge
Can you crack these very difficult challenge ciphers? How might you systematise the cracking of unknown ciphers? -
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problemStatistical shorts
Can you decide whether these short statistical statements are always, sometimes or never true?
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problemAll change
There are three versions of this challenge. The idea is to change the colour of all the spots on the grid. Can you do it in fewer throws of the dice?
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problemWho's the winner?
When two closely matched teams play each other, what is the most likely result?
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problemDistribution differences
How could you compare different situations where something random happens? What sort of things might be the same? What might be different?
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problemDrug testing
How do different drug-testing regimes affect the risks and payoffs for an athlete who chooses to take drugs? -