median
don steward
mathematics teaching 10 ~ 16

Saturday, 18 April 2020

what's gone wrong?

this problem posed by
jack frohlichstein (publ. dover, 1962)
mathematical fun, games and puzzles puzzle 153
free pdf version of book here

a ppt is here

oh, shouldn't they be the same answer?


Sunday, 5 April 2020

sum squared minus sum squared

a ppt is here









links with the sum of the cubes

area proofs with insight

a ppt is here

an effort to collect together proofs that involve some form of geometrical insight

thanks to Dietmar Kuchemann

there are several good sources for geometrical problems
those by Ed Southall and Vincent Pantolini
and Catriona Shearer
are fairly well known

























Saturday, 4 April 2020

chair problems

a ppt is here

a mix of questions




nth term rule?
two others...

diameters in feet