Wednesday, June 16, 2010

How To Remove Automotive Grease From Carpet



We have twelve apparently identical coins, but one of them weighs slightly more. Using a pan balance and weighing only three to find the different currency.

Made by: María.Sánchez and Cristina.Ruiz
Source: http://www.juegosdelogica.com/neuronas/acertijos2.htm

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