Move just three of the circles so that the triangle faces in the opposite direction.
What are the coordinates of the coloured dots that mark out the tangram? Try changing the position of the origin. What happens to the coordinates now?
A game for 2 people that everybody knows. You can play with a friend or online. If you play correctly you never lose!
Exchange the positions of the two sets of counters in the least possible number of moves
A variant on the game Alquerque
An interactive activity for one to experiment with a tricky tessellation
A generic circular pegboard resource.
Take it in turns to place a domino on the grid. One to be placed horizontally and the other vertically. Can you make it impossible for your opponent to play?
An odd version of tic tac toe
A card pairing game involving knowledge of simple ratio.
How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!
Investigate how the four L-shapes fit together to make an enlarged L-shape. You could explore this idea with other shapes too.
Use the interactivity to find out how many quarter turns the man must rotate through to look like each of the pictures.
A game for 2 people that can be played on line or with pens and paper. Combine your knowledege of coordinates with your skills of strategic thinking.
An interactive game to be played on your own or with friends. Imagine you are having a party. Each person takes it in turns to stand behind the chair where they will get the most chocolate.
Choose 13 spots on the grid. Can you work out the scoring system? What is the maximum possible score?
Our 2008 Advent Calendar has a 'Making Maths' activity for every day in the run-up to Christmas.
Train game for an adult and child. Who will be the first to make the train?
Incey Wincey Spider game for an adult and child. Will Incey get to the top of the drainpipe?
Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?
How have the numbers been placed in this Carroll diagram? Which labels would you put on each row and column?
Twenty four games for the run-up to Christmas.
A train building game for 2 players.
Work out the fractions to match the cards with the same amount of money.
Try to stop your opponent from being able to split the piles of counters into unequal numbers. Can you find a strategy?
Match the halves.
Ahmed has some wooden planks to use for three sides of a rabbit run against the shed. What quadrilaterals would he be able to make with the planks of different lengths?
Complete the squares - but be warned some are trickier than they look!
Play this well-known game against the computer where each player is equally likely to choose scissors, paper or rock. Why not try the variations too?
An interactive game for 1 person. You are given a rectangle with 50 squares on it. Roll the dice to get a percentage between 2 and 100. How many squares is this? Keep going until you get 100. . . .
NRICH December 2006 advent calendar - a new tangram for each day in the run-up to Christmas.
A game for 1 or 2 people. Use the interactive version, or play with friends. Try to round up as many counters as possible.
A game to be played against the computer, or in groups. Pick a 7-digit number. A random digit is generated. What must you subract to remove the digit from your number? the first to zero wins.
Can you fit the tangram pieces into the outline of Little Ming playing the board game?
Can you fit the tangram pieces into the outlines of the chairs?
Can you fit the tangram pieces into the outlines of the lobster, yacht and cyclist?
Can you fit the tangram pieces into the outline of this brazier for roasting chestnuts?
Can you fit the tangram pieces into the outlines of these people?
Can you fit the tangram pieces into the outline of this plaque design?
Can you fit the tangram pieces into the outline of the child walking home from school?
A game for 1 person. Can you work out how the dice must be rolled from the start position to the finish? Play on line.
Take it in turns to make a triangle on the pegboard. Can you block your opponent?
Use the Cuisenaire rods environment to investigate ratio. Can you find pairs of rods in the ratio 3:2? How about 9:6?
Find out how we can describe the "symmetries" of this triangle and investigate some combinations of rotating and flipping it.
Choose the size of your pegboard and the shapes you can make. Can you work out the strategies needed to block your opponent?
Can you fit the tangram pieces into the outlines of Mai Ling and Chi Wing?
This is a game for two players. Can you find out how to be the first to get to 12 o'clock?
Can you fit the tangram pieces into the outline of this shape. How would you describe it?
Starting with the number 180, take away 9 again and again, joining up the dots as you go. Watch out - don't join all the dots!