Quote:
quote:Originally posted by prettyvacant
thank god i worked it out, i can go to bed now (teach me to look on here at bedtime)
ok then as i was nearly deprived of sleep; try this:
you have eight identical objects, but one weighs more. You have a pair of scales, but you are only allowed to use them twice. How do you find out the odd one?
This is not a trick, it can be done.
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Weigh three against three.
if they balance then the odd one is in other two. Balance those to see which is heavier.
if they dont then you can tell which side is heavier then balance one against one . If one side goes down, thats the heavy one, if they balance the third one is the heavy one.
Actually you can find it from 9 if you apply the same principle. 3 v 3. Then 1 v 1.