confusingggg |
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 May 17 2007, 05:02 PM
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#1
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 long time no CB.  Group: Official Member Posts: 3,889 Joined: Jan 2007 Member No: 493,502  |
Um, this is so confusing.
Can anyone help me out?  Okay, here's the problem.. You have 8 balls, all of which look exactly the same. Seven of these weigh the same, and one is either heavier or lighter than the others. You have a balance scale. Tell how you can find the odd ball in at most three weighings, and explain how you can decide whether the odd ball is heavier than the others, or whether it is lighter than the others. I don't even get the question. 
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May 17 2007, 06:38 PM
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#2
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Senior Member Group: Member Posts: 148 Joined: Dec 2004 Member No: 68,934 |
Hopefully, this quick illustration will help. The red ball indicates the other ball. However, this illustration shows the red ball as the heavier ball. I'm sure you can imagine it weighing less, if it happens to be so.
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May 17 2007, 06:43 PM
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#3
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long time no CB. Group: Official Member Posts: 3,889 Joined: Jan 2007 Member No: 493,502 |
OHHHHH! Thank you SO MUCH!
 I can't believe I couldn't think of thatt 
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May 17 2007, 09:47 PM
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#4
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Senior Member Group: Member Posts: 148 Joined: Dec 2004 Member No: 68,934 |
No problem.
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| *JoanOfArc* |
May 17 2007, 10:41 PM
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#5
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Guest |
Since the poster's question has been answered, I guess I should close this. Unless you'd still like this open, PM me.
Wow...that reminds me of the lighthouse thing. Teases your brain. Topic Closed. |
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