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| Acmlm's Board - I2 Archive - Brain Teasers - Quick riddle |
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Mr. F-Zero Paratroopa Level: 20  Posts: 29/158 EXP: 40634 For next: 1805 Since: 09-09-04 From: London Since last post: 176 days Last activity: 52 days |
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| OK, heres the deal. You have nine diamonds, all exactly the same in size and looks, etc. But, one of them is heavier, and you cannot tell which is heavier by picking them up. You don't know which one, so you have a pair of scales (ie. scales which have two bowls and move up and down depending on the other bowl's weight. Like this: http://www.go.ednet.ns.ca/~ip96003/scales.gif ) So, in order to do so you have to weigh them. But, you can only weigh a set of diamonds twice. How do you do it? You can weigh more than one diamond per scale. (edited by Mr. F-Zero on 10-09-04 08:19 AM) |
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NSNick Laidback Admin Level: 85  Posts: 1211/3875 EXP: 5895841 For next: 2699 Since: 03-15-04 From: North Side School: OSU Since last post: 9 hours Last activity: 1 hour |
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| The diamonds are ABCDEFGHI. 1) Weigh ABCD v. EFGH a) They are equal. b) ABCD is heavier. c) EFGH is heavier. 2a) I is the heavy one. 2b) Weigh AB v. CD 1) AB is heavier. 2) CD is heavier. 2c) Weigh EF v. GH 1) EF is heavier. 2) GH is heavier. 3b1) Pick up A and B and feel which is heavier 3b2) Pick up C and D and feel which is heavier 3c1) Pick up E and F and feel which is heavier 3c2) Pick up G and H and feel which is heavier |
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Mr. F-Zero Paratroopa Level: 20 Posts: 31/158 EXP: 40634 For next: 1805 Since: 09-09-04 From: London Since last post: 176 days Last activity: 52 days |
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| NSNick... I dont want to be picky, you're answer is good, but I want the answer to be made using only the scales, and not by picking up with your hands. Ill change the weight difference in the question so that picking up with hands isn't an option (if it was, you could just compare with your hands anyway without a scale). | |||
Heian-794 Red Super Koopa Level: 44 Posts: 481/896 EXP: 611014 For next: 271 Since: 06-01-04 From: Kyoto, Japan Since last post: 21 days Last activity: 10 days |
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| OK, how about this? 1. Split them into three groups of three: ABC, DEF, GHI 2. Weigh ABC vs. DEF -a. They're equal, so the heavy one is in GHI -> go to 2a -b. ABC is heavier -> go to 2b -c. DEF is heavier -> go to 2c 2a. Weigh G vs. H; the heavier one is the one we want, and if they're equal, it's I 2b. Weigh A vs. B; the heavier one is the one we want, and if they're equal, it's C 2c. Weigh D vs. E; the heavier one is the one we want, and if they're equal, it's F At no point is a diamond weighed more than twice. (edited by Heian-794 on 10-09-04 06:04 PM) |
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NSNick Laidback Admin Level: 85 Posts: 1213/3875 EXP: 5895841 For next: 2699 Since: 03-15-04 From: North Side School: OSU Since last post: 9 hours Last activity: 1 hour |
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| Ah. Nice. | |||
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Mr. F-Zero Paratroopa Level: 20 Posts: 33/158 EXP: 40634 For next: 1805 Since: 09-09-04 From: London Since last post: 176 days Last activity: 52 days |
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| Heian is correct! OK, try this: Identify these two cities which differ only in the letters shown: * * C H * R * * * * * D * P * * * Each star is a letter. |
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Smallhacker Green Birdo SMW Hacking Moderator Level: 68  Posts: 614/2273 EXP: 2647223 For next: 81577 Since: 03-15-04 From: Söderhamn, Sweden Since last post: 10 hours Last activity: 9 hours |
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| The first one is "ANCHORAGE". Can't figure out the sencond one. |
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Mr. F-Zero Paratroopa Level: 20 Posts: 35/158 EXP: 40634 For next: 1805 Since: 09-09-04 From: London Since last post: 176 days Last activity: 52 days |
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Smallhacker... Anchorage isnt a city.  (edited by Mr. F-Zero on 10-10-04 09:34 AM) |
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Smallhacker Green Birdo SMW Hacking Moderator Level: 68 Posts: 616/2273 EXP: 2647223 For next: 81577 Since: 03-15-04 From: Söderhamn, Sweden Since last post: 10 hours Last activity: 9 hours |
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Then I know why I couldn't figure the second one out.  |
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NSNick Laidback Admin Level: 85 Posts: 1215/3875 EXP: 5895841 For next: 2699 Since: 03-15-04 From: North Side School: OSU Since last post: 9 hours Last activity: 1 hour |
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| Anchorage is a city, but obviously not the right one. | |||
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Mr. F-Zero Paratroopa Level: 20 Posts: 36/158 EXP: 40634 For next: 1805 Since: 09-09-04 From: London Since last post: 176 days Last activity: 52 days |
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My bad.  but still. Anchorage isnt what i was looking for. Heres a clue, it begins with B. |
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Smallhacker Green Birdo SMW Hacking Moderator Level: 68 Posts: 622/2273 EXP: 2647223 For next: 81577 Since: 03-15-04 From: Söderhamn, Sweden Since last post: 10 hours Last activity: 9 hours |
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| Is the 2nd one "B U D A P E S T"? | |||
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Mr. F-Zero Paratroopa Level: 20 Posts: 37/158 EXP: 40634 For next: 1805 Since: 09-09-04 From: London Since last post: 176 days Last activity: 52 days |
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| Yes. Therefore that makes the first one incredibly easy. | |||
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Heian-794 Red Super Koopa Level: 44 Posts: 484/896 EXP: 611014 For next: 271 Since: 06-01-04 From: Kyoto, Japan Since last post: 21 days Last activity: 10 days |
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| Which therefore means that the answers are BUDAPEST and BUCHAREST! | |||
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Smallhacker Green Birdo SMW Hacking Moderator Level: 68 Posts: 627/2273 EXP: 2647223 For next: 81577 Since: 03-15-04 From: Söderhamn, Sweden Since last post: 10 hours Last activity: 9 hours |
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Damn. I would have figured that one out, if only Bucharest was spelled the same in swedish.  |
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