game
Favourite
Diamond collector
Collect as many diamonds as you can by drawing three straight lines.
Being collaborative
problem
Favourite
Domino square
Age
7 to 11
Challenge level
Use the 'double-3 down' dominoes to make a square so that each side has eight dots.
problem
Favourite
Have you got it?
Age
11 to 14
Challenge level
Can you explain the strategy for winning this game with any target?
problem
Favourite
Numerically equal
Age
7 to 11
Challenge level
Can you draw a square in which the perimeter is numerically equal to the area?
problem
Favourite
Skeleton shapes
Age
5 to 7
Challenge level
How many balls of modelling clay and how many straws does it take to make these skeleton shapes?
problem
Favourite
Peaches today, peaches tomorrow...
Age
11 to 14
Challenge level
A monkey with peaches, keeps a fraction of them each day, gives the rest away, and then eats one. How long can his peaches last?
problem
Favourite
Board block challenge
Age
7 to 11
Challenge level
Choose the size of your pegboard and the shapes you can make. Can you work out the strategies needed to block your opponent?
problem
Favourite
Multiples grid
Age
7 to 11
Challenge level
What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?
problem
Favourite
Reaction timer
Age
11 to 14
Challenge level
This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.
problem
Favourite
Coded hundred square
Age
7 to 11
Challenge level
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?