I don't know this one either, but does it have something to do with breaking down the balls into 3 groups of 4 balls in each group and then comparing the weights of the each group and going on from there? It seems like mathematically it could be broken down...
Tracy
>You have 12 billiard balls.
>
>One of them is either lighter or heavier than the others.
>
>You can weigh the billiard balls 3 times on a balance scale.
>
>You need to find out which ball it is and whether it is heaver or lighter.
.·*´¨)
.·`TCH
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