11.11.11

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Happy unary day! And happy unary moment!

Unary, what we used to call tallying in elementary school, is the simplest and oldest counting system. Each item you are counting is matched up with a marked line, on paper or in the sand or carved into clay, in a perfect one-to-one correspondence.

So take today to celebrate counting in all its forms! 1 … 2 … 3 … Ah ha ha!

The Count

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Posted eleven seconds before 11:11:11 on 11/11/11

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1 Comment

Filed under math

One response to “11.11.11

  1. Pingback: Happy 12-12-12 Day! | Maryland Math Madness

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