You are given nine balls identical in appearance. Eight of the nine balls weigh the same, whilst one weighs slightly less.

You are given a set of scales and weights.

Using the scales only twice. Describe how you find the odd ball?

## Comments

not a robot

it is all about trios :)
Divide into 3 groups - weight two, if they are equal then the light ball is in the third group, if not ... well you know ;)
Weight two balls from the light group using approach above.

Created 28/05/09