Saturday, 18 April 2020
what's gone wrong?
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this problem posed by jack frohlichstein (publ. dover, 1962) mathematical fun, games and puzzles puzzle 153 free pdf version...
Friday, 17 April 2020
two types of sum
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a ppt is here
Sunday, 5 April 2020
sum squared minus sum squared
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a ppt is here links with the sum of the cubes
area proofs with insight
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a ppt is here an effort to collect together proofs that involve some form of geometrical insight thanks to Dietmar Kuchemann there are...
Saturday, 4 April 2020
chair problems
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a ppt is here a mix of questions nth term rule? two others... diameters in feet
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