Every day is five Australian places and one way of ordering them — north to south, west to east, or nearest to farthest from a capital.
You are never told which way a wrong rung is wrong — only that it is wrong. With five places that is enough to work with and not so much that the second try is a formality.
Distances are great-circle — as the crow flies, not as the Hume drives — measured from coordinates rounded to about a kilometre. No two rungs on any day are closer together than 60 km, so nothing here turns on that rounding.