Can you find diffrent ball by three times?

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Discussion Overview

The discussion revolves around a puzzle involving 12 balls, where one ball is either lighter or heavier than the others. Participants explore whether it is possible to identify the different ball using a balance scale within three weighings. The conversation touches on the nature of the puzzle and its classification within mathematical reasoning.

Discussion Character

  • Exploratory, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant presents the problem of identifying a different ball among 12 using a balance scale up to three times.
  • Another participant questions the classification of the puzzle as "General Math," suggesting it relies more on cleverness than mathematical skill.
  • A third participant reiterates the premise of the puzzle, emphasizing the difference in weight of one ball.
  • There is a claim that there is only one way to find the different ball, though this is not elaborated upon.
  • One participant comments on the historical context of similar puzzles in Chinese mathematics and mentions its appearance in a computer game, questioning the relevance of the original post.

Areas of Agreement / Disagreement

Participants express differing views on the nature of the puzzle and its classification. There is no consensus on the best approach to solving the problem or on the relevance of the discussion to the mathematical community.

Contextual Notes

Some assumptions about the puzzle's parameters and the methods of weighing are not explicitly stated, leading to potential ambiguity in the discussion.

godsaveme
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There are 12 balls, including a ball with other balls, it is lighter or heavier than others, can you use a Balance without weights to find out the different ball Up to three times?
 
Last edited:
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Unfortunately, I'm not sure if this is really for "General Math," this is a pretty well-known puzzle, and relies on one's general cleverness as opposed to one's mathematical cleverness.

Probably a better translation would be (no offence):

"Suppose you have three balls, one of which is either lighter or heavier than the others. With a balance-based scale, is it possible to determine which ball is the one with a different weight, and whether it's heavier or lighter, in three balances?"
 
there are twelve balls,but one of them is different.
Different is its weight
 
can you find the different one ?
Only one way
 
You have now posted 7 times in this one thread with only two responses. Yes, Chinese mathematics has a long and noble heritage. And determining which of a set of balls, or coins, weight more or less than the others is an old, traditional puzzle (it even appears in one of the old "Zork" computer games by Infocom). But what is your point?
 
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