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ST1: If you mean factors, there are 5 (1,3,5,25,75). If you mean numbers multiplied to make 75, that is unclear, bc it could be 1x75 or 3x5x5, so that would be 2 or 3 numbers. In any event, you can make a heck of a lot of different numbers when you multiply 5 numbers together, or 2 numbers together, or 3 numbers together. Each might have a different number of factors.
ST2: Although it needs some clarification in whether it is supposed to be a^2b or (a^2)(b), ST2 will give you a definitive number of factors.
[quote="gmatornot"]I think the answer here is B
ST 1 Same number of factors
75 has a total of 6 factors so x would also have the same number of factors (i.e. 6) and plus k more (x is a multiple of those factors)
ST 2 I am assuming is a^2b => Total number of factors will be 3*2 = 6 hence SUFF[/quote]