This one took me days to solve. Here's the setup: an ungraduated balance scale and 12 apparently identical balls. Only, one of the 12 balls is of a slightly different density than the other 11. Using the scale only 3 times, how can you discern without any uncertainty, which is the different ball? Sorry, but I actually have to resolve this one myself again. Work on it, and I'll post the solution soon.

## Question

## Guest

This one took me days to solve. Here's the setup: an ungraduated balance scale and 12 apparently identical balls. Only, one of the 12 balls is of a slightly different density than the other 11. Using the scale only 3 times, how can you discern without any uncertainty, which is the different ball? Sorry, but I actually have to resolve this one myself again. Work on it, and I'll post the solution soon.

## Link to post

## Share on other sites

## 2 answers to this question

## Recommended Posts

## Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.