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The Spectrum Agency Test SOLUTIONS

(1) Solution:

First take Trunch across the river. Asimov and Carlucci are safe together. Then take Asimov across but since you can’t leave Asimov and Trunch together you must bring Trunch back. Then take Carlucci across the river. Finally come back for Trunch. Everyone is safely on the other side.

(2) Solution: Put three bars on each side of the scales. If they balance then the gold bar you didn’t put on the scales is the counterfeit. Otherwise put the three bars that are lightest on the scales. Take two of these bars and put them on either side of the scales. If they balance, then the bar you didn’t put on the scales is the counterfeit. Otherwise, the lighter of the two bars is the counterfeit.

(3) Solution: 42