median
don steward
mathematics teaching 10 ~ 16

Saturday, 8 November 2014

mobile moments

the diagrams are sketches, the numbers on the bars show the ratios/proportions along the bars
















Dean Ballard's fibonacci mobile















Erich Friedman's weight puzzles are great...



place weights 1 to 5 so that this mobile balnces
place weights 1 to 5 so that this mobile balances



place weights 1 to 6 so that this balances





place weights 1 to 7 so that this balances





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