Arthur Benjamin: Lightning calculation and other “Mathemagic” (TED talk)

Calculating double digit numbers faster than a calculator, then doing triple digit numbers. This guy is either a freak of nature, or he’s being fed the answers at lightening speed through an earpiece.

Then the guy works out the day people were born, based on the year, month, and date. Again at lightening speed.

Not much to learn here, but it’s certainly entertaining. Inspiring? No.

(Part of TED a day for June)

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