50 Mathematical Ideas You Really Need to Know

(Marcin) #1

Remarkably, this is a magic square consisting of the consecutive numbers 3,
4, 5, up to 11. We also find that the number of letters of the magic sums of both
3×3 squares (21 and 45) is 9 and fittingly 3 × 3 = 9.


the condensed idea


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