All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Logic > Weights and Scales
L OR H (Posted on 2022-04-18) Difficulty: 2 of 5
A set of 101 coins consists of 100 genuine coins of equal weight plus one fake coin which is either
a. lighter
OR
b. heavier
than a genuine one.

Using only equal-arm-balance, please determine in two weighings whether it is a. or b.

IMHO it is a nice puzzle, but I doubt whether the result has any practical meaning. Objections? Let my know.

Source: Leningrad Math. Competition, former USSR.

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionAnother solutionBrian Smith2022-04-19 12:57:10
SolutionsolutionCharlie2022-04-18 11:43:54
SolutionSolutionBrian Smith2022-04-18 10:34:15
solnSteven Lord2022-04-18 07:36:57
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (8)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2024 by Animus Pactum Consulting. All rights reserved. Privacy Information