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Two stones
This game is known as Pong hau k'i in China and Ou-moul-ko-no in Korea. Why not challenge a friend to play it with you?
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Biscuit decorations
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Whose face?
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A city of towers
In this town, houses are built with one room for each person. There are some families of seven people living in the town. In how many different ways can they build their houses?
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Skip counting
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Butterfly flowers
Can you find two butterflies to go on each flower so that the numbers on each pair of butterflies adds to the number on their flower?
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Nim-7
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What shape and colour?
Can you fill in the empty boxes in the grid with the right shape and colour?
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Share bears
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Robot monsters
Use these head, body and leg pieces to make Robot Monsters which are different heights.
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Sort the street
Sort the houses in my street into different groups. Can you do it in any other ways?
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Number lines
Leah and Tom each have a number line. Can you work out where their counters will land?
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Two-digit targets
You have a set of the digits from 0 to 9. Can you arrange these in the five boxes to make two-digit numbers as close to the targets as possible?
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What is the time?
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Incey Wincey Spider
You'll need two dice to play this game against a partner. Will Incey Wincey make it to the top of the drain pipe or the bottom of the drain pipe first?
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Seeing squares
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
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Four triangles puzzle
Cut four triangles from a square as shown in the picture. How many different shapes can you make by fitting the four triangles back together?
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Teddy Town - part five
There are thirty six teddies in Teddy Town - six red, six blue, six yellow, six green, six purple and six turquoise. There are also thirty six houses, six of each colour. Can you put them on the map of Teddy Town according to the rules?
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Three by three
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Mixed-up socks
Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair. Is there more than one way to do it?
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Three way mix up
Jack has nine tiles. He put them together to make a square so that two tiles of the same colour were not beside each other. Can you find another way to do it?
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Teddy bear line-up
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Missing middles
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Making sticks
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Domino join up
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Four colours
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Make 37
Four bags contain a large number of 1s, 3s, 5s and 7s. Can you pick any ten numbers from the bags so that their total is 37?
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Teddy Town
There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?
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Three block towers
Take three differently coloured blocks - maybe red, yellow and blue. Make a tower using one of each colour. How many different towers can you make?
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Teddy Town - part two
There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?
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Ladybird box
Place six toy ladybirds into the box so that there are two ladybirds in every column and every row.
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Teddy Town - part three
There are sixteen teddies in Teddy Town - four red, four blue, four yellow and four green. There are also sixteen houses, four of each colour. Can you put them on the map of Teddy Town according to the rules?
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Teddy Town - part four
There are twenty five teddies in Teddy Town - five red, five blue, five yellow, five green and five purple. There are also twenty five houses, five of each colour. Can you put them on the map of Teddy Town according to the rules?
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4 dom
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The third dimension
Here are four cubes joined together. How many other arrangements of four cubes can you find? Can you draw them on dotty paper?