ATTAK Z Posted January 12, 2018 Share Posted January 12, 2018 https://www.pistonheads.com/gassing/topic.asp?h=0&f=&t=1717877 Quote Link to comment Share on other sites More sharing options...
The Bounty Bar Kid Posted January 13, 2018 Share Posted January 13, 2018 you mean a link that doesn't work? Not much of a puzzle 1 Quote Link to comment Share on other sites More sharing options...
Toon Chris Posted January 13, 2018 Share Posted January 13, 2018 (edited) https://www.pistonheads.com/gassing/topic.asp?h=0&f=&t=1717877 The difficult bit is that you don't know if it will be lighter or heavier Split into 3 lots of 4 matches (A), (B), (C) Put (A) on left, (B) on right. If A=B then discard B. If A<>B put B to one side and replace with C. If A=C you know the different match is in B. If A<>C you know the different match is in A. You also know if it is heavier or lighter based on the difference in weights you saw (you did write them down didn't you? ) Assuming the different match is heavier, now you have 4 matches and can split 2 on each side, pick the heavy side ans split that into 2 and voila. Full disclosure: I didn't read the rest of the thread but it did take me a few minutes to work it out! Edited January 13, 2018 by Toon Chris Quote Link to comment Share on other sites More sharing options...
Jay84 Posted January 13, 2018 Share Posted January 13, 2018 Yeah I had it all worked out, then realised I didn't know if the odd one heavier or lighter, and that threw it out the window. I was going to halve them, keep the heavier side. then 3 on a side, keep the heavier side. Then 1 on each side. If it balanced, the one not on the scale is the odd one. But if the odd one was lighter than the other 11, I'd still have 6 to sort and no scale to use...going to read the rest of the thread for the solution now Quote Link to comment Share on other sites More sharing options...
scobie140 Posted January 13, 2018 Share Posted January 13, 2018 9 hours ago, The Bounty Bar Kid said: you mean a link that doesn't work? Not much of a puzzle I thought it was a trick thismorning 1 Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted January 13, 2018 Author Share Posted January 13, 2018 Don't know what I'm doing wrong for the link ... this is how it should be done isn't it ? address Quote Link to comment Share on other sites More sharing options...
Jay84 Posted January 13, 2018 Share Posted January 13, 2018 45 minutes ago, scobie140 said: I thought it was a trick thismorning Me too. Started working this afternoon when I was at work though. Quote Link to comment Share on other sites More sharing options...
glrnet Posted January 13, 2018 Share Posted January 13, 2018 Original linky still now worky and "address" linky comes back here!! Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted January 13, 2018 Author Share Posted January 13, 2018 54 minutes ago, glrnet said: Original linky still now worky and "address" linky comes back here!! Not sure what's going on Graham ... I've had this before ... also if I press return now it will take me back to further up the thread and I have to scroll down again to finish the post WEIRD before you ask I'm on a MacBook Pro and Safari it just took me back to post 6 Quote Link to comment Share on other sites More sharing options...
Ebized Posted January 13, 2018 Share Posted January 13, 2018 I had some issues that included ballsing up the forum on my Mac using Safari a little while back immediately after a Safari update and my friendly IT crew could not figure it out, but took their advice to change to Firefox and the 'issues' disappeared. Damn sure they push out these software updates to cure reported issues only to create new ones and happy to let users be the guinea pigs. Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted January 13, 2018 Author Share Posted January 13, 2018 (edited) Thanks Colin just want back to post 2 and the post number (top right) says this is post one and now it's post 11 Edited January 13, 2018 by ATTAK Z Quote Link to comment Share on other sites More sharing options...
Stutopia Posted January 14, 2018 Share Posted January 14, 2018 19 hours ago, Toon Chris said: https://www.pistonheads.com/gassing/topic.asp?h=0&f=&t=1717877 The difficult bit is that you don't know if it will be lighter or heavier Split into 3 lots of 4 matches (A), (B), (C) Put (A) on left, (B) on right. If A=B then discard B. If A<>B put B to one side and replace with C. If A=C you know the different match is in B. If A<>C you know the different match is in A. You also know if it is heavier or lighter based on the difference in weights you saw (you did write them down didn't you? ) Assuming the different match is heavier, now you have 4 matches and can split 2 on each side, pick the heavy side ans split that into 2 and voila. Full disclosure: I didn't read the rest of the thread but it did take me a few minutes to work it out! Just one more thing... Say the odd one is A1 and heavier, then... You weighed Group A & Group B = A was heavier. You weighed Group A & Group C = A was heavier. Disregard Groups B & C. You split into A1 + A2 and weigh against A3 + A4 = A1 + A2 are heavier. Disregard A3 + A4. You now know it’s A1 or A2, haven’t you used up all three of your weighs? Quote Link to comment Share on other sites More sharing options...
KyleR Posted January 14, 2018 Share Posted January 14, 2018 With a bit of luck you could do it. Weigh A and B, if both the same it has to be C. Weigh C1 and C2, no matter what the result, note it and remove C2 and replace with C3. If C1 was heavier than C2 and is heavier than C3 also, then you know C1 is the odd one. If it was heavier than C1 but weighs the same as C3, then you know C2 is the odd one. If C1 and C2 weighed the same and so does C1 and C3 then you know C4 is odd. If C1 and C2 weighed the same and the result is different with C1 and C3 then you know C3 is odd. You can substitute heavier for lighter in this method, it doesn't matter as after weighing C1 and C3 you'll know which. Of course this all goes to @*!# if A and B weigh different in the beginning as we don't know if it's supposed to be heavier of lighter. Quote Link to comment Share on other sites More sharing options...
Toon Chris Posted January 14, 2018 Share Posted January 14, 2018 1 hour ago, SuperStu said: Just one more thing... Say the odd one is A1 and heavier, then... You weighed Group A & Group B = A was heavier. You weighed Group A & Group C = A was heavier. Disregard Groups B & C. You split into A1 + A2 and weigh against A3 + A4 = A1 + A2 are heavier. Disregard A3 + A4. You now know it’s A1 or A2, haven’t you used up all three of your weighs? You are right. A is four matches and you have only one weigh left. My method leaves you with 2 matches but you don't know which is the dodgy one. Damn. Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted January 14, 2018 Author Share Posted January 14, 2018 :whistle: Quote Link to comment Share on other sites More sharing options...
Stutopia Posted January 14, 2018 Share Posted January 14, 2018 You can't blow the whistle without posting the answer! I did think the key to this is weighing two groups of 5 and leaving 2 to one side, but I can't quite figure out how you then root out the individual from there, if you don't know if it's lighter or heavier. GODDAMMIT Quote Link to comment Share on other sites More sharing options...
ATTAK Z Posted January 14, 2018 Author Share Posted January 14, 2018 @superStu The answer is on the PH thread ... V8LM got it very quickly Quote Link to comment Share on other sites More sharing options...
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