Stuart McLachlan
stuart at lexacorp.com.pg
Mon Sep 19 16:12:29 CDT 2011
Not in some third world country, WW2 concentration camps http://en.wikipedia.org/wiki/Jakow_Trachtenberg -- Stuart On 19 Sep 2011 at 12:56, jwcolby wrote: > When I was in high school I read a book written by a guy who spent > years in a prison in some third world country. With nothing to do all > day he did mental math and discovered just tons of these kinds of > tricks. He claimed (and I was too lazy to actually learn it all) that > you could multiply and divide huge numbers in your head using his > tricks. > > John W. Colby > www.ColbyConsulting.com >