With 10 fingers, you can count to 2^10.

Useful, unless you're my ISP and you dictate that 1Gb = 1000Mb.

Ah, Telstra Bigpond - a team that would mandate pi=3.0 because the value of simplicity far outweighs, you know, actually having practical applications.

1Gb is 1000Mb. 1Gib is 1024Mib.

there's an even better technique called Chisenbop. It allows you to defer basic calculations to a mechanical process. It's described in "mind performance hacks" from o'reilly.

http://www.ludism.org/mentat/MindPerformanceHacks_2fTurnYour...