Here's my today's problem,
(Q3)There are 10 sets of 10 coins.You know that how much the coins should weigh.You know thatall the coins in one set of ten are exactly a hundredth of an ounce off,making the entire set of ten coins a tenth of an ounce off.You also know that that all the other coins weigh the correct amount. You are allowed to use an extremely accurate digital weighing machine.
What is the minimum number of times you need to use the machine to find out the faulty set? How?