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Re: Number property - even/odd problem [#permalink]
23 Jul 2008, 23:47
Is A + B + C even? (1) A - B - C is even (2) (A-C) is odd
I go with A
St1: A if odd then B+C is odd => A+B+C is even and A if even B+C is even => A+B+C is even. There can be no case where st 1 is true and we cant say what A+B+C would be.----suffic
St2: A-C is odd now nothing has been told abt B hence insuff