don steward
mathematics teaching 10 ~ 16

Tuesday, 15 February 2011


place the digits 2 to 7 (used once only) in the circles

multiply (in pairs) to get the nine products in the table

add these nine products

how do you place the six digits to get the highest possible total?

the maximum is 182
how is this maximum achieved?

all of the row (and column) totals divide by a certain number (other than 1)
what is it and why is this?

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