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Less is More

7 to 11

Use your knowledge of place value to try to win this game. How will you maximise your score?

problem

Tea Cups

7 to 14

Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.

article

The Four Colour Conjecture was first stated just over 150 years ago, and finally proved conclusively in 1976. It is an outstanding example of how old ideas can be combined with new discoveries. prove a mathematical theorem.