I must be pen-blind ... will need to do research on my way home tonight! | Hacker News

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pbhjpbhj on Jan 13, 2016 | parent | context | favorite | on: The Dying Art of Mental Math Tricks

I must be pen-blind ... will need to do research on my way home tonight!

pbhjpbhj on Jan 14, 2016 [–]

3:3 for having pens - TIL.

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