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Hollow ball (Posted on 2005-03-25) Difficulty: 3 of 5
Before you are two balls, one solid and one hollow. They are to all appearences completely identical: same size, same weight, same outer material (though one might assume, correctly, that the hollow ball would need a higher-density material on the inside to make it the same weight).

Without breaking either of the balls, how can you easily determine which is hollow?

Assume that the material is solid enough that a hitting the side of the hollow ball will not result in any noticeable echo or vibrations.

See The Solution Submitted by Sam    
Rating: 3.6667 (3 votes)

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  Subject Author Date
SolutionREAL SOLUTIONAerik2006-03-14 02:18:47
SolutionJoshua2005-10-02 16:49:24
re: Guesskat2005-04-06 01:12:06
re: AM I STUPID OR WHATHugo2005-04-01 20:39:20
AM I STUPID OR WHATSteve Royer2005-04-01 05:09:23
re: solutionnp_rt2005-03-31 20:26:11
Solutionsolutionadam2005-03-31 00:07:13
solutionCarl LeGrand2005-03-30 17:15:06
re: correctionajosin2005-03-29 12:06:01
SolutionGuessDavid2005-03-28 05:41:07
re: SummaryRex2005-03-27 14:57:50
SummaryLarry2005-03-27 02:11:27
re: correctionnp_rt2005-03-26 18:31:21
correctiondan2005-03-26 17:31:00
Not to be to mean but...ajosin2005-03-26 15:45:16
Some ThoughtsOf cats and other related things.Rex2005-03-26 14:59:48
SolutionSolutionStephen Ticsay2005-03-26 14:57:18
re(2): No SubjectLarry2005-03-25 21:14:27
re: No SubjectHugo2005-03-25 19:29:24
No Subjectarmando2005-03-25 19:11:20
another wayLarry2005-03-25 17:50:50
The WRONG! answer...Erik O.2005-03-25 17:30:09
re: If you don't have a ramp availableJer2005-03-25 17:07:36
If you don't have a ramp availableHugo2005-03-25 16:54:36
One Possible Method and Proof Why it Worksnp_rt2005-03-25 15:57:13
Solutioniamkobe2005-03-25 15:43:08
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