don steward
mathematics teaching 10 ~ 16

Sunday 31 July 2016

number puzzles

it may be helpful to have numbers (e.g. on card) to move around

there is an added dimension/extension of proving various statements, usually connected to the sum of the numbers used and those numbers that are in more than one line

Graeme Brown did some Excel versions of four of these puzzles (the first three and hollow triangle (i))
these can be found at nrich 5512

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