Published onJuly 4, 2026Conquering the Nasty Surd Integralshsc-mathsextension-2calculusadvancedA cheat code for HSC Ext 1 & 2 students to bypass trigonometric substitution and directly integrate inverse surd functions using logarithmic forms.
Published onJuly 4, 2026Introducing Vu's Maths Hub: The Definitive Resource for NSW HSC Extension 1 and Extension 2 Mathematicshsc-mathsextension-1extension-2announcementWelcome to Vu's Maths Hub, an independent Australian mathematics resource platform providing free, specialised NESA-aligned maths booklets for high-achieving secondary students.
Published onJuly 3, 2026Divisibility by 9 via Digit Sumhsc-mathsextension-2proofsnumber-theorymediumA direct biconditional proof demonstrating that a three-digit number is divisible by 9 if and only if the sum of its digits is divisible by 9.
Published onJuly 3, 2026The Pigeonhole Principle and Leading Digitshsc-mathsextension-2pigeonhole-principlelogarithmshardA guided proof demonstrating that the orbit of an irrational rotation is dense using the Pigeonhole Principle, and proving that there exists a power of 2 starting with 2025.
Published onJuly 3, 2026Sequence Limits and the Squeeze Theoremhsc-mathsextension-2sequenceslimitssqueeze-theoremA challenging HSC Extension 2 Mathematics problem exploring the evaluation of sequence limits using inequalities and the Squeeze Theorem.