In a ring around southern Bendigo. Most are no longer used, although the (old) Sandhurst res was one of them. One in Golden Square somewhere too. There's an old map of them, but Google isn't cooperating.
The one up the Gully behind 7 is called No 4
Part of No1 is the stretch of Maple St in front of the Maple St Primary School. I think numbers 2 to 6 were never built because no 1 was a failure. They jumped straight from 1 to 7 to try and redeem their finances.
I vaguely remember that Neil is right. There is a information board somewhere, I think out at no. 7