Also in the address department: Europe numbers houses roughly sequentially along the whole street, while the Americas (generally) assign house numbers based on the distance to the beginning of the block.
And BTW, in the old towns of Sweden and Finland blocks do have names!
I haven't seen the increase by five, but by twos when the odds/evens are separated across the street from each other. 101's next door neighbor is 103 while 102 is across the street next door to 104.
