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:
 Is there a defective wrench?
 If there is a defective item, is it heavier or lighter?
(In reply to
Solution by Bob)
Na you got it right, thats how I figured it too. Only I didnt write it all out, cut typing corners with mathmatic symbols for the less than/greater than bits. It more of an algebra prob than anything, I should know I had that only year before last. Its a simple prob if a sophmore can solve it with ease. And I did, in my head, then I wrote it out to check it for errors. Its sound man, I dont see how that could be wrong.

Posted by Shadow
on 20040704 16:41:36 