If k is a common multiple of 75, 98, and 140, which of the following statements must be true?...............
During the test I did not think that 0 could be a multiple of these numbers and assumed that their LCM would the smallest multiple (and hence got this question right!) but now as I think that 0 could be a multiple of each of 75, 98, and 140, I don’t know whether to feel happy or sad.


I was wondering whether this is GMAC’s mistake or whether GMAC is consistent with this in other questions?