problem
Favourite
Doing and undoing
Age
5 to 11
Challenge level
An investigation looking at doing and undoing mathematical operations focusing on doubling, halving, adding and subtracting.
problem
Favourite
What was in the Box?
Age
5 to 7
Challenge level
This big box adds something to any number that goes into it. If you know the numbers that come out, what addition might be going on in the box?
problem
Favourite
What's happening?
Age
5 to 7
Challenge level
Shapes are added to other shapes. Can you see what is happening? What is the rule?