In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?
Digital Software - Top titles available to download instantly, including Microsoft Office 2013, Adobe Creative Cloud, Quicken, QuickBooks, Autodesk, Corel, Rosetta Stone and more.