Posted by **Jill** on Wednesday, December 23, 2009 at 9:42pm.

There are 10 similar coins, but 2 of them are fake. The fake ones are lighter than the real ones, but both have the same weight. You are give a balance scale, and you should determine which coins are fake. At least how many weighings do you need to find the fake coins?

## Answer this Question

## Related Questions

- PROBLEM SOLVING IN MATHEMATICS - you have 13 bags of gold wins. out of 13 bags ...
- PROBLEM SOLVING IN MATHEMATICS - you have 13 bags of gold wins. out of 13 bags ...
- Math - In a group of 9 coins, one is fake and weighs slightly less. What is the ...
- math - In a group of 9 coins, one is fake and weighs slightly more. What is the ...
- math - 1. Finding the Counterfeit Coin. You have 5 coins. You know that one of ...
- Literature - I need to make a fake letter from Roger [in Langston H's short ...
- English - 10. How does Algernon find out where Jack’s house in the country is ...
- College Math - Suzy has a bag containing 5 red marbles, 2 green ones, 4 white ...
- CHEMISTRY - Give names of the following covalent (nonmetallic) compounds: S4N2 ...
- English - 1. I'll be there(=in prison) for seven years for making fake money. 2...