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Old 07-07-2004, 13:32   #19
altis
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Location: Warrington ntl:81304 Altitude: 12m (and falling)
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Re: A Weighty ball problem?

Quote:
Originally Posted by zoombini
Now to make it worse, how do you tell if the odd one out is heavier or lighter?
Follow my 'basic' program and you will be able to tell if it's heavier or lighter in every case except the last one. To arrive at ball H you will have had three balances so you'll need to compare it with one of the others to find out if it's heavier or lighter.

On balance, perhaps it would have been clearer if I'd labelled the stages 1, 2a, 3a, 3b, 2b, 3c and 3d instead of 1 to 7.
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