An odd version of tic tac toe
Try to stop your opponent from being able to split the piles of counters into unequal numbers. Can you find a strategy?
NRICH December 2006 advent calendar - a new tangram for each day in
the run-up to Christmas.
Our 2008 Advent Calendar has a 'Making Maths' activity for every
day in the run-up to Christmas.
How many different rhythms can you make by putting two drums on the
An interactive activity for one to experiment with a tricky tessellation
A game for 2 people that everybody knows. You can play with a
friend or online. If you play correctly you never lose!
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.
Can you fit the tangram pieces into the outlines of the chairs?
Can you fit the tangram pieces into the outline of the child walking home from school?
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?
Can you fit the tangram pieces into the outlines of these clocks?
Can you fit the tangram pieces into the outlines of the lobster, yacht and cyclist?
Move just three of the circles so that the triangle faces in the
A card pairing game involving knowledge of simple ratio.
Can you fit the tangram pieces into the outline of Granma T?
Investigate the smallest number of moves it takes to turn these
mats upside-down if you can only turn exactly three at a time.
Play this well-known game against the computer where each player is
equally likely to choose scissors, paper or rock. Why not try the
Use your mouse to move the red and green parts of this disc. Can
you make images which show the turnings described?
Use the interactivity to find out how many quarter turns the man must rotate through to look like each of the pictures.
Can you fit the tangram pieces into the outlines of these people?
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?
You have 4 red and 5 blue counters. How many ways can they be
placed on a 3 by 3 grid so that all the rows columns and diagonals
have an even number of red counters?
Can you fit the tangram pieces into the outline of this telephone?
Use the interactivities to complete these Venn diagrams.
Twenty four games for the run-up to Christmas.
A train building game for 2 players.
Use the interactivity to create some steady rhythms. How could you
create a rhythm which sounds the same forwards as it does
Choose 13 spots on the grid. Can you work out the scoring system? What is the maximum possible score?
Incey Wincey Spider game for an adult and child. Will Incey get to the top of the drainpipe?
Train game for an adult and child. Who will be the first to make the train?
Using angular.js to bind inputs to outputs
Complete the squares - but be warned some are trickier than they
Explore the different tunes you can make with these five gourds.
What are the similarities and differences between the two tunes you
Arrange any number of counters from these 18 on the grid to make a rectangle. What numbers of counters make rectangles? How many different rectangles can you make with each number of counters?
Imagine a wheel with different markings painted on it at regular
intervals. Can you predict the colour of the 18th mark? The 100th
Can you fit the tangram pieces into the outline of this junk?
Can you fit the tangram pieces into the outline of Little Fung at the table?
Match the halves.
If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?
Can you work out how to balance this equaliser? You can put more
than one weight on a hook.
Can you find just the right bubbles to hold your number?
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?
Can you fit the tangram pieces into the outline of this brazier for roasting chestnuts?
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. . . .
Can you fit the tangram pieces into the outlines of the workmen?
Can you fit the tangram pieces into the outline of Little Ming and Little Fung dancing?
This was a problem for our birthday website. Can you use four of these pieces to form a square? How about making a square with all five pieces?