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Stmt 1. All three are odd. So, looking at K, any ODD X ODD will be ODD, so:
K = (ODD)(ODD)(ODD) = ODD
Stmt 2. We know that if 2 is one of the prime numbers used for X, Y, or Z, then it would add to an EVEN number. This is not the case. X, Y, and Z must be prime numbers greater than 2, so ODD + ODD + ODD = ODD. So all three are ODD and then we're back to K = (ODD)(ODD)(ODD) = ODD