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Home > Logic > Weights and Scales
These problems relate to objects of different weight, and using a balanced scale to determine the odd item, be it a false coin, or an under-filled sack of grain. (Usually it's coins though)
Three identical weights are to be suspended from the ends of a rigid light1 "Y"-shaped frame. Each arm of the frame is to be of a different length.

How is this to be accomplished (ie, how do you shape the "Y") so that the 'system' is in equilibrium within a horizontal plane?

















1 "light" is meant as being weightless, having no concern for mass.
Note too, the colours are the radial ring extremeties of the "Y" arms within the horizontal plane.
(Solution Posted, 10 Comments) Submitted on 2009-12-22 by brianjn   
Page 1 of 5   next >>    
Difficulty: 3 of 5Multipan Balance | Rating: 3.00
Posted on 2009-01-18 by Brian Smith (No Solution Yet, 3 Comments)
Difficulty: 2 of 5True coins, fake coins |
Posted on 2008-10-23 by pcbouhid (Solution Posted, 6 Comments)
Difficulty: 2 of 5Water at 76º C | Rating: 4.00
Posted on 2008-06-17 by pcbouhid (Solution Posted, 5 Comments)
Difficulty: 3 of 5Circular Balance | Rating: 2.50
Posted on 2008-03-20 by brianjn (Solution Posted, 22 Comments)
Difficulty: 3 of 5Unreliable scale | Rating: 3.00
Posted on 2008-02-28 by FrankM (Solution Posted, 3 Comments)
Difficulty: 3 of 5Four Coins and Three Weighings | Rating: 4.33
Posted on 2007-03-08 by Brian Smith (Solution Posted, 10 Comments)
Difficulty: 3 of 5Weighing Coins |
Posted on 2007-02-21 by Dennis (Solution Posted, 5 Comments)
Difficulty: 5 of 5Ceremonial Stones | Rating: 3.00
Posted on 2006-11-14 by Bractals (Solution Posted, 25 Comments)
Difficulty: 5 of 5Radioactive Coins | Rating: 4.40
Posted on 2006-10-17 by David Shin (No Solution Yet, 13 Comments)
Difficulty: 3 of 5Which is Which | Rating: 3.00
Posted on 2006-07-07 by Salil (No Solution Yet, 14 Comments)
Difficulty: 3 of 5I Only Need Two - Part II | Rating: 4.25
Posted on 2006-01-23 by Vernon Lewis (Solution Posted, 1 Comments)
Difficulty: 3 of 5I Only Need Two | Rating: 3.50
Posted on 2005-11-09 by Brian Smith (Solution Posted, 5 Comments)
Difficulty: 2 of 5Two sets of Coins | Rating: 3.50
Posted on 2005-10-07 by Brian Smith (Solution Posted, 7 Comments)
Difficulty: 4 of 5One or Two Fake Coins | Rating: 3.67
Posted on 2005-09-13 by Brian Smith (No Solution Yet, 4 Comments)
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