Problem 71 Answer

Weigh any three pearls against any other three. If one side is higher than the other the fake pearl is on that side. If the sides stay equal the fake pearl is in the three you didn't use. For the second weighing take any two of the bad three and weigh one against the other. If one side goes up that side has the fake pearl. If the two sides stay the same the unused pearl of the three is fake.

Michael Shackleford, A.S.A.