Works because multiplication and division are interchangeable in the order
In many countries, the number may go after the street, but the PM's residence refers to itself as "10 Downing Street". Anyone would would know the address would know it from hearing it described that way. Ditto 221B Baker Street. If you know what I'm talking about, you read it that way.
I got two of the pop culture answers trying to guess the first Republican president. I just started guessing with all the early presidents I know and hit both Monroe and Jackson. Was very surprised first republican came so late. I'm probably missing something about the development of the GOP.