Logidyne Labs is testing a Device. One of the side effects of the Device is to minutely increase the mass of certain alloys in its immediate vicinity.A scalpel was used in the Device Room today. Per Logidyne procedure, the scalpel will now have to be quarantined until it can be determined to be safe. However, a clumsy assistant has mixed up the scalpel with eight other scalpels.
The nine scalpels are identical in every way, except that the scalpel from the Device room will be heavier than the others.
Using a pair of balancing scales, how can the heavy scalpel be identified in only two weighings?
