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Wrenches (Posted on 2004-07-02) Difficulty: 2 of 5
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?

See The Solution Submitted by Brian Smith    
Rating: 2.8333 (6 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Scale or balancejohn2005-04-06 17:20:38
Cool QuestionLozza2004-09-13 04:06:32
Here is solution...Patricia Stamets2004-07-04 22:59:23
re: SolutionShadow2004-07-04 16:41:36
Some Thoughtsre: A shotAdy TZIDON2004-07-03 02:13:26
SolutionA shotrohit2004-07-03 00:30:20
re(3): Balanced solutionArunava Dutta2004-07-02 11:00:30
re(2): Balanced solutionEric2004-07-02 10:52:04
re(2): Balanced solutionfwaff2004-07-02 10:33:39
Some Thoughtsre: Balanced solutionArunava Dutta2004-07-02 10:31:49
SolutionBalanced solutionfwaff2004-07-02 10:26:09
Solutionre: Solution - My solutionArunava Dutta2004-07-02 10:23:33
Some ThoughtsSolutionEric2004-07-02 09:17:57
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