You may also like

Pebbles

Place four pebbles on the sand in the form of a square. Keep adding as few pebbles as necessary to double the area. How many extra pebbles are added each time?

I'm Eight

Find a great variety of ways of asking questions which make 8.

Sweets in a Box

How many different shaped boxes can you design for 36 sweets in one layer? Can you arrange the sweets so that no sweets of the same colour are next to each other in any direction?

Ordering Cards

Age 5 to 11
Challenge Level

Look at these cards.
 
 
 
Can you sort them so that they follow round in a loop?
 
 Here is a card from a different set.
 
 card
What number would follow it?
 
What about this one? What would follow it?

 card
 
You can download the above set of cards here.