Discrete Math Problem

[Naomi]

Hi everybody! I'm currently learning Discrete Math for personal enrichment, but I seem to be a little stuck. I don't exactly know what to do in the first step, I'm sure this question is pretty simple, but still.

"Which 4-tuples are in relation {(a,b,c,d)|a,b,c, and d are positive integers with abcd = 6]?"

All I could think of is (1, 2, 3).

 

[pka]

Without seeing the entire question, I cannot be certain that I know what is being asked.
First, (1,2,3) is not a 4-tuple, it is a triple.
But here is a 4-tuple that does work: (1,1,2,3).
But do each of these: (1,2,1,3), (3,2,1,1), (1,1,1,6).
Do you get the idea.

 

[Naomi]

That's the entire question. Also I'm aware that (1,2,3) isn't a 4-tuple. I didn't know that a number could be repeated. I get it now, thanks.

 

[DrMike]

That's the entire question. Also I'm aware that (1,2,3) isn't a 4-tuple. I didn't know that a number could be repeated. I get it now, thanks.

A useful tip for discrete maths is -
* a definitions means exactly what it says, and says exactly what it means.
so, if they don't say that numbers can't be repeated, they can. And if you don't want numbers to be repeated, you must say so.

Keep this in mind when reading definitions and questions and problems, or you'll face this kind of difficulty may time over..