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Which is Which (Posted on 2006-07-07) Difficulty: 3 of 5
You have six balls - three red and three black. All the red balls weigh differently, i.e. one of them is heavy, the other medium, and the third light. Each red ball has a black twin of the same weight. A heavy and a light ball put together weigh as much as two medium balls.

What is the least number of weighings required on a balancing scale to determine which is which?

No Solution Yet Submitted by Salil    
Rating: 3.0000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionAnother SolutionBrian Smith2016-06-28 11:58:20
re(2): A different solutiongregg tsujimoto2006-08-11 19:30:37
re: A different solutionatul2006-08-10 23:30:53
SolutionA different solutiongregg tsujimoto2006-08-10 08:57:41
No Subjectameya2006-08-08 12:15:56
SolutionSolutionDej Mar2006-07-11 15:35:41
re(2): needs checking/ figures can't lieant simmons2006-07-10 15:49:20
Questionre: needs checking/ figures can't lieAdy TZIDON2006-07-10 03:24:59
needs checkingant simmons2006-07-09 19:44:26
theoretic limitCharlie2006-07-09 13:47:35
hintSalil2006-07-08 06:06:26
SolutionSolution (at least I'd like to think so.)Liz2006-07-08 00:06:59
re: Less trivial boundaryDej Mar2006-07-07 16:06:41
Some ThoughtsLess trivial boundarySteve Herman2006-07-07 11:14:56
Some ThoughtsTrivial boundaryFederico Kereki2006-07-07 10:22:33
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