Can you recreate squares and rhombuses if you are only given a side or a diagonal?
Alison and Charlie are playing a game. Charlie wants to go first so Alison lets him. Was that such a good idea?
Which countries have the most naturally athletic populations?
How well can you estimate 10 seconds? Investigate with our timing tool.
Play around with sets of five numbers and see what you can discover about different types of average...
Where should you start, if you want to finish back where you started?
Imagine we have four bags containing numbers from a sequence. What numbers can we make now?
How many more miles must the car travel before the numbers on the milometer and the trip meter contain the same digits in the same order?
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its vertical and horizontal movement at each stage.
Start with two numbers and generate a sequence where the next number is the mean of the last two numbers...
