There are 4 wrenches just unpacked from a box. They all look the same. There might be one defective item which is either heavier or lighter. Fortunately there is a fifth one that is standard. If you can use a scale to weigh only 2 times, can you find out:

1. Is there a defective wrench?

2. If there is a defective item, is it heavier or lighter?

(In reply to re: Balanced solution by Arunava Dutta)

Keep in mind this is a scale, and not a balance.

Posted by Eric on 2004-07-02 10:52:04