I did my selective test this year (put mhs first preference) and I finished all 60 questions on maths. For those wonder what the last questions was: you had to find the ratio between the surface area of a cone and the shaded area of a parabola. The answer was D for those wondering. Anyways here is a full guide on how to prepare for the maths component:

TRIGONOMETRY: LEARN ALL RATIOS è.g tan(60) = sqrt(3), sin(45) = 1. Also learn “SOH CAH TOA”

FINANCIAL MATHEMATICS: SIMPLE INTEREST AND COMPOUND INTEREST AND LOAN REPAYMENT (This came up in the last 15 questions.

LINEAR EQUATIONS: Learn how to calculate the gradient/equation/slope of a straight line. Learn the distance between two colinear points formula.

PARABOLAS: Learn how to determine the equation of a parabola.

CIRCLE GEOMETRY: Learn CYCLIC QUADRILATERLAS (THIS CAME UP THIS YEAR), I also recommend going through the whole topic.

GEOMETRY: LEAEN HOW TO CALCULATE THE VOLUME AND SUEFACE AREA OF A CONE A SPHERE(HAD TO KNOW THIS FOR QUESTION 60), AND PRETTY MUCH ALL 3D SHAPES. Also learn ow to calculate the area of all 2D shapes.

SURDS AND SCIENTIFIC NOTATION: learn the basic concept of scientific notation AND LEARN HOW TO SIMPLIFY SURDS.

QUADRATIC AND CUBIC EQUATIONS: Practice these in a year 10 textbook.

THE RESOURCES I USED: Overall you should master year 9 and 10 maths. I used the Cambridge year 10 mathematics textbook, and trust me for those who are sitting the test next year, learn the maths now and spend more time on English. By the end of this year you should master the maths and use the Christmas holidays to master english