If you see certain numbers, how do they register in your mind? Keep in mind this is generally in the idea that it's presented without any context. So it isn't in date form or decimal form (off the bat anyway). For instance, say you see the set 1758. Is it 1758 or 1 7 58 or 1 7 58? In the same vein, if you see a number set that some backwoods yonker didn't separate properly, like "29474028" do you see 2947 4028; 29,474,028; or 29 47 40 28? Or do you recognize it some other way?
If it's a four digit number, I usually see it as a year.