Heylo,
Coincidentally, I just did my maths competition today so Im gonna talk about it in a way of how I think of it.
So I've joined the competition for a couple of years and the questions were mostly problems with stories.
Eg. Gary went to the supermarket and got milk for $5.60. If he gave in $10, how much change did he get?
The competition doesn't really include quadratics and linear equations. They are more problem solving, arithmetic and geometry.
The problem solving task most commonly include measurement there are a couple with ratios and money.
The geometry questions most of the time would ask us to find one of the angles of a circle or triangle.
I can't exactly remember what they give us for arithmetic soz.
Finally the last 5 of the hardest questions may be problem solving as well, as they require thinking A LOT to solve the problem. And since it may be the hardest in the competition, that is why the points are worth the most.
So ^thats how I think of the competition and the different parts to it.
I think to help you get a general idea, maybe get a copy of one of the competitions of your year level or above and get a general idea of what the questions will be based on. If you want real versions of the competition from the past (i have a few year 9 and 10) or have any questions, you can PM me.