Amy has a box containing domino pieces but she does not think it is a complete set. Which of her domino pieces are missing?

These clocks have only one hand, but can you work out what time they are showing from the information?

What does the overlap of these two shapes look like? Try picturing it in your head and then use some cut-out shapes to test your prediction.

What shape is the overlap when you slide one of these shapes half way across another? Can you picture it in your head? Use the interactivity to check your visualisation.

On a digital clock showing 24 hour time, over a whole day, how many times does a 5 appear? Is it the same number for a 12 hour clock over a whole day?

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.