Amazing finger calculator x 9

Just saw this "Amazing Finger Calculator" video on metacafe. It's another one for all of the maths nerds out there! This follows on from the 12 times table trick I posted earlier. This one focuses on the 9 times table.

Makes me wondering if people can tell the time with just their fingers? Is it possible? I guess it's probably easier to just pickup a Patek Philippe watch!

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