It's like mischevious elves delivered the numbers one night and people just decided to go with it

You know when you're driving in the US and you're looking for an address?  You're all, OK, I need 458 Smith Drive.  Well, that house there is 251 Smith, and now here's 265, so since they're odd-numbered I know that the one I need will be on the other side of the street, and it's coming right up, not on this next block but the one after that... And you do this little mental exercise and then ta-daaaaaa! there it is and you move on to the business of finding a parking spot?  Because there's a consistent pattern to the numbering system and the one you want is right where it should be?  You know what I'm talking about?

Yeahhhhh.  Not so much here.  Here, you look up an address and get a free brain teaser. 

One fun challenge is that buildings frequently have several numbers.  You might be looking for 458 Smith Drive, but the label on the building will say 457-500 Smith Drive...yay, it tests your basic reasoning skills! 

And there's no convention about Odds on this side and Evens on that side... they go where they go.  Oooh, this one's about observation. 

Or, now, this is a really amusing one:  sometimes, you'll be on the correct street, and within the correct number range, but the number you want just plain isn't there.   This one is called Communication Skills (also known as Asking The Right Question), because in this game you get to accost multiple passersby for directions until you encounter someone who knows that what you need to do is go down the alleyway, around the corner, and then into the back door.

Or my personal favourite.  This is when the bus gets to within ten or twenty numbers of the one you want, so you go ahead and hop off at this stop because you're so obviously nearby.  But, ooh, surprise, there's the delightful task of determining that you're still eight blocks away.  This one is called Testing Your Assumptions.  Although sometimes it's called Making Excuses for Being Late.