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Centre for Innovation in Mathematics Teaching
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Number Puzzles 2
In this collection of number puzzles, from the Centre for Innovation in Mathematics Teaching (CIMT), students have to find missing numbers each of which is depicted by a different colour. The product of the numbers at the corners of each triangle or quadrilateral is equal to the number in the middle. The magnitude or quantity of numbers required is given in the title of the puzzle.
The final puzzle in this collection requires the use of inequalities where each differently-coloured rectangle represents a different number that satisfies the inequality shown.
LH puzzle: each line of four numbers adds up to 51
RH puzzle: each line of four numbers adds up to 75
Further information on the puzzles and their links to the practice books can be found on the CIMT website.
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