Mathemagics
by Arthur Benjamin, Michael Brant Shermer
3mentions
2recommended by
3HN commenters
2017–2025first – last mentioned
67% recommend33% neutral
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'Mathemagics' https://www.amazon.co.uk/Mathemagics-Genius-without-Really-T... This is awesome book, it teach you all sort of tricks from 3 digits addition to 3 digits multiplication. I know its written for school…
on “Tips to Improve Your Mental Math Ability” ↗There's a book called Mathemagics with chapters which take about an hour to read which will teach you how to remember numbers and do mental arithmetic
on “Ask HN: What's the most valuable thing you can learn in an hour?” ↗The brute force got reduced down to fast heuristics, like Arthur Benjamin's Mathemagics.
on “Learn Prolog Now (2006)” ↗