Addition is all you need to be able to do to tackle these tricky tasks.
But that doesn't mean they are going to be easy...
problem
Favourite
Forwards add backwards
Age
11 to 14
Challenge level
What happens when you add a three digit number to its reverse?
problem
Favourite
Add to 200
Age
11 to 14
Challenge level
By selecting digits for an addition grid, what targets can you make?
problem
Favourite
Impossibilities
Age
11 to 14
Challenge level
Just because a problem is impossible doesn't mean it's difficult...
problem
Favourite
Overlaps
Age
11 to 14
Challenge level
Can you find ways to put numbers in the overlaps so the rings have equal totals?