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prime numbers

Wearing Your Heart – and Some Numbers – on Your Sleeve
November 6th, 2014

It’s a big job to knit a sweater, not to mention a sweater that teaches math. But Sondra Eklund has done just that with her super-colorful, stripey prime factorization cardigan. Forget using a calculator – all she needs to do is look down at her sleeves to do the math!

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