There's a girl I'm texting at the moment, who I number closed at a party and kiss closed on day 2 and day 3. I moved to a different city literally 6 days after meeting her. I'm going back for a weekend in a few weeks to see friends and I want to fclose her then.

When I was first met her I was chatting with authority about men being attracted to certain things, and women being attracted to certain things, and how its instinctive. I'd come out with something along the lines of "Only, like, 5% of men in the world can get dressed up, go out, and get approached by women", and I got questioned, "How do you know its 5%?". Dealt with that fine, but I got it again shortly after with: "How do you know what people are attracted to, different people are attracted to different things? Its subjective.", and "How do you know its a fact?". In response to these I told her I believed it and changed the subject.

I wasn't sure how to deal with these, but I've just got a similar kind of thing on the text.
I wrote: "OMG X is definitely the 2nd most attractive thing about you"
Her Reply: "I wonder what could be even more attractive about me? <one of her skills>?"
My reply: "The more attractive things? Thats a secret. :-)"
Her response: "How do you mean, it's a secret? Surely its a matter of opinion."

Has anyone else ever encountered these kind of questions before?

Dude, if a woman gets deep, I'd answer truthfully and if she didn't like it, tough. most girls can disagree with you on a point or two and still shag you. Don't disagree on anything that seems really personal to her thouhg.

If you lose out while being honest, there's 6 more waiting.... and try not to get into that kind of conversation again.

Well she's a girl...But giving that response she is seeking affection, approval...A compliment. You have already built comfort, you've n closed and k closed so you've pretty much done the hard work. If she's asking whats more attractive then either be honest or change the subject. Don't joke about it, she won't like that. I'd personally tell the truth...BUT, I would do it in a casual way, so say something like "I'd say your smile is the single most attractive thing about you. Oh btw I was reading this article blah blah blah".

Interesting advice guys.
I think you might be right En1gma. That idea could just be the ticket.