Visualising and representing
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problemSwap the stars with the moons, using only knights' moves (as on a chess board). What is the smallest number of moves possible? -
problemMidpoint Triangle
Can you cut up a square in the way shown and make the pieces into a triangle? -
problemA Flying Holiday
Follow the journey taken by this bird and let us know for how long and in what direction it must fly to return to its starting point.
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problemColour Wheels
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
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problemPaw Prints
A dog is looking for a good place to bury his bone. Can you work out where he started and ended in each case? What possible routes could he have taken?
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problemPainted Faces
Imagine a 3 by 3 by 3 cube made of 9 small cubes. Each face of the large cube is painted a different colour. How many small cubes will have two painted faces? Where are they?
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problemMore Building With Cubes
Here are more buildings to picture in your mind's eye. Watch out - they become quite complicated!
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problemReef and Granny
Have a look at what happens when you pull a reef knot and a granny knot tight. Which do you think is best for securing things together? Why?
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problemPutting Two and Two Together
In how many ways can you fit two of these yellow triangles together? Can you predict the number of ways two blue triangles can be fitted together?
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problem28 - Upward and Onward
Can you find ways of joining cubes together so that 28 faces are visible?