idku
  • idku
little challenge. You have 8 balls (all look and) weight the same BUT 1 of the balls weights less than the rest. You have a scale, and you can use the scale twice. How can you determine which ball is the ball that weighs less ?
Mathematics
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idku
  • idku
little challenge. You have 8 balls (all look and) weight the same BUT 1 of the balls weights less than the rest. You have a scale, and you can use the scale twice. How can you determine which ball is the ball that weighs less ?
Mathematics
schrodinger
  • schrodinger
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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idku
  • idku
oh, message. please don't just give it away...
sdfgsdfgs
  • sdfgsdfgs
"You have 8 balls (all look and) weight the same BUT 1 of the balls weights less than the rest." I think it should say... "You have 8 balls (all look and) weight the same PLUS 1 balls which weighs less than the rest." :)
idku
  • idku
but is a corresponding conjunction that fits the purpose that I want to indicate. That is, that although 8 balls weight the same, there is an exception (one of the balls weighs less).

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welshfella
  • welshfella
yes but that is 3 weighings
sdfgsdfgs
  • sdfgsdfgs
@idku its ur Q so u get to decide how it reads :P i just thought making 9 the total no. of balls will make the Q easier! lol
welshfella
  • welshfella
if you take 2 pairs of 3 and they weigh the same then the light ball is one of the other 2 You then weigh one against the other to find the light ball.
welshfella
  • welshfella
oh we have nine balls?
welshfella
  • welshfella
oh we decide 8 or 9 right?
sdfgsdfgs
  • sdfgsdfgs
@welshfella Nope - I thought it was with 9 balls but OP said its 8. either way u got it :)
geerky42
  • geerky42
\(\color{blue}{\text{Originally Posted by}}\) @sdfgsdfgs "You have 8 balls (all look and) weight the same BUT 1 of the balls weights less than the rest." I think it should say... "You have 8 balls (all look and) weight the same PLUS 1 balls which weighs less than the rest." :) \(\color{blue}{\text{End of Quote}}\) I'm sure OP is intended to say first one...
imqwerty
  • imqwerty
the question is what is the final question??
welshfella
  • welshfella
now if one set of 3 balls weigh differently you take the lightest and pick 2 out and weigh them again If 0ne wieghs light its that one If they weigh the same its the other ball.
sdfgsdfgs
  • sdfgsdfgs
correct @welshfella n thats why I thought making a total 9 would be easier. But same method will work for 8.
welshfella
  • welshfella
good question

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