How do different drug-testing regimes affect the risks and payoffs for an athlete who chooses to take drugs?
Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this?
How could you put eight bean bags in the hoops so that there are four in the blue hoop, five in the red and six in the yellow? Can you find all the ways of doing this?
Julia refines our model, and the interactivity offers a chance to simulate the outbreak of an infectious disease, recognising that not everyone is the same.
This problem explores the biology behind Rudolph's glowing red nose, and introduces the real life phenomena of bacterial quorum sensing.
Find all the triples of numbers a, b, c such that each one of them plus the product of the other two is always 2.
Take 5 cubes of one colour and 2 of another colour. How many different ways can you join them if the 5 must touch the table and the 2 must not touch the table?
