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15th Apr 2016, 11:38

#19 (permalink)

BatteriesNotIncluded

Join Date: May 2015

Location: London

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Quote:

Originally Posted by The Ancient Geek

Learn about mental arithmetic shortcuts.
1448 + 2 = 1450
1450 + 23 = 1513
1513 - 2 = 1511

Thanks for the tip, Sir.

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