posted 17 years ago
Good one.. take 1 coin from the first bag, 2 from the second, 3 from the third .. and 10 from the tenth bag.
Stack these coins separatly on your penny scale, plonk in your penny and measure it. The weight will be xx.yy oz
if yy is 1, it means that you had 1 counterfeit coin weighing 1.1, so bag 1 is the culprit, .2 means you had 2 bad coins, so bag 2 is the culprit and so on...
[ May 07, 2002: Message edited by: Thomas Paul ]