Fake coins II
I still have fake coins... but now I have a more recent scales :
an acurate one, able to give the exact weight of a set of coins.
A good coin is 10g and a fake one 9g.
I know I have 2 fake coins im my heap of 5 coins.
How many weighings are required in worst case to find them ?
I have also 10 fake coins in my bag of 100 coins. How many weighing in worst case ?
Details (includes Java applet)