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> Riddle me this, Tease your brain!
Goatman
post Feb 20 2006, 03:31 AM
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i guess i'll try to renew this:

there are 10 identical rods. 9 are made of iron, one is made of gold. Each is cut into 10 pieces. The little pieces of iron each weigh 1 pound and the gold pieces each weighs 2 pounds. Useing a scale only once how can you find out which rod is made of gold?


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Yoda
post Mar 1 2006, 12:15 PM
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This seems fairly obvious, but will it be the shiny yellow one?

PS: The answer to mine was 'rant', which QH did indeed correctly guess in a PM.


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Goatman
post Mar 2 2006, 12:10 AM
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QUOTE(Goatman @ Feb 19 2006, 10:31 PM) *

i guess i'll try to renew this:

there are 10 identical rods. 9 are made of iron, one is made of gold. Each is cut into 10 pieces. The little pieces of iron each weigh 1 pound and the gold pieces each weighs 2 pounds. Useing a scale only once how can you find out which rod is made of gold?



note the word identical


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Ravenwood
post Mar 3 2006, 08:05 PM
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[font=Comic Sans Ms][i][color=#3333FF]I could be wrong, but if you weigh one rod, and it weighs 1 pound, wouldn't any rod of double its weight be the gold ones?


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Goatman
post Mar 5 2006, 02:28 AM
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but you can only use the scale one time, if u use it to measure a rod you won't be able to use it again, thus u won't be able to figure it except through luck


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Ravenwood
post Mar 5 2006, 07:28 PM
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OK, I'll assume there's another answer... (Personally, I think if I have one pound of something in my hand, and I pick up something in the hand that is twice as heavy, i would notice the difference.) Hmmm... let me think. Can I put more that one rod on the scale at once?

This post has been edited by Ravenwood: Mar 5 2006, 07:29 PM


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QuickHare
post Mar 9 2006, 12:15 AM
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You can only use the scales once, but I assume to weigh any mass you wanted (including multiple rods). I'd suggest an Archemedes jug to help with density?


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Billywig2
post Mar 9 2006, 05:52 AM
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If you put all of the peices onto the scale, and take them off one at a time, you can tell how much it weighs by how much less the whole lot weighs, and therefore tell which ones wiegh 2 pounds, and therefore pick out the gold bits, right?

This post has been edited by Billywig2: Mar 9 2006, 05:52 AM


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Goatman
post Mar 10 2006, 04:36 AM
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but you can only weigh it once. after that the scale breaks or turns off. One weighing and that's it!!! it's not that easy!!!


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Yoda
post Mar 10 2006, 01:09 PM
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How can they be identical rods if they are made up of different component atoms?


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Goatman
post Mar 12 2006, 03:41 AM
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they're painted


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Ravenwood
post Mar 12 2006, 08:11 PM
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Goatman
post Mar 13 2006, 03:47 AM
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lol

here’s a hint:

if you were to pick up any number of rods, think about what the possibilities are for how much it will weigh. Then think of ways to ensure that the amount is definitive, or following a pattern.

if this or any part of the riddle is unclear just reply


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Drie
post Mar 14 2006, 12:49 AM
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icon_juggle.gif Um...juggle them! The heaviest one is bound to fall on my foot and break my toe.


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Billywig2
post Mar 14 2006, 10:15 PM
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so this is kind of like the blind man picking socks from his drawer thing? ... only a little more complicated?


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If I ever found a pot of gold,
I'd buy bottles untold of the nectar of the vines,
'cos I'm gonna die with a twinkle in my eye,
'coz I sung songs, spun stories, loved, laughed and drank wine.

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The cats are out to play, to play!
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