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This is a set theory question regarding relative complement.

If $A = \{n \in \Bbb{N} : 5 \mid n\}$ and $B = \{n \in \Bbb{N} : 10 \mid n\}$. List all of the elements that are in $A \setminus B$.

Wouldn't this be asking to list an infinite number of multiples of $5$ that have the multiples of $10$ taken away from them? If not, then what is this question expecting an answer of?

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    maybe something like A\B = $\lbrace n \in \mathbb{N} : 10 | n+5 \rbrace$2012-09-09
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    The question isn't very well phrased. By "listing" the elements I assume it means writing them as a set.2012-10-05

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