The clues for this Sudoku are the product of the numbers in adjacent squares.
How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?
Start with two numbers and generate a sequence where the next number is the mean of the last two numbers...
Semi-regular tessellations combine two or more different regular polygons to fill the plane. Can you find all the semi-regular tessellations?
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.
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its speed at each stage.
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects the distance it travels at each stage.
These clocks have only one hand, but can you work out what time they are showing from the information?
The Man is much smaller than us. Can you use the picture of him next to a mug to estimate his height and how much tea he drinks?
Can you hang weights in the right place to make the the number balance balanced?
