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Re: If a, b, and c are positive integers, what is the greatest common divi
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24 Dec 2018, 01:56
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If a, b, and c are positive integers, what is the greatest common divisor of a, b and c?
GCD means the largest number which has all three numbers a, b and c in its table.
(1) The greatest common divisor of a and b is 3 this means GCD of a, b and c can be only 3, but we don't know if 3 is a factor of c or not. If yes, GCD is 3, otherwise it is 1. Insufficient
(2) The greatest common divisor of b and c is 4 this means GCD of a, b and c can be only 4, but we don't know if 4 is a factor of a or not. If yes, GCD is 4, otherwise it is 1. Insufficient
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63% (01:27) correct 
