Welcome! MathSir (Colin Chan) is the editor and webmaster of this website . If you're a Hong Kong DSE student feeling a little overwhelmed by the mountains of formulas, past papers, and tricky questions, you have come to the right place. He created this blog with one simple mission:
We simplify the tough stuff, so you can ace your DSE Maths.
Let's be honest—school textbooks can be dry, dense, and filled with jargon. They tell you what the answer is, but they rarely show you how to arrive at it logically. That's where we come in. MathDSE.Com doesn't just teach math; we help you understand the "why" behind every equation.
He is a passionate mathematics tutor based in Hong Kong. Over the years, He has worked with numerous DSE students from various banding schools, helping them navigate the demanding HKDSE Mathematics Core and M1/M2 curricula. He realized that the biggest barrier for most students is not a lack of intelligence — it is a lack of clear, methodical guidance.
That is why he founded this website. Here, we combine experiences with a clean, structured teaching approach. we write every article DAILY as if MathSir is sitting right next to you, talking you through a tough problem step-by-step. We believe that if a concept cannot be explained simply, it hasn't been understood deeply enough. This blog is my effort to put that belief into practice.
We have meticulously structured the content to align perfectly with the Exam Curriculum Framework. Whether you are preparing for your school internal test/exam. or the final public exams, these resources cover everything you need.
My articles are broken down into the three core strands of the syllabus:
Struggling with Number Systems or Polynomial Identities? Unsure how to tackle Quadratic Equations and Functions? We break down the abstract logic behind algebraic manipulations. You won't just memorize the formula for sequences; you will understand why the arithmetic and geometric formulas work the way they do.
Geometry and Trigonometry are often the most visually intimidating topics. In this section, We provide clear, diagram-friendly guides for Circle Theorems, Coordinate Geometry, Mensuration, and messy 3D Trigonometry problems. We show you how to visualize the problem before you even pick up your calculator.
Statistics and Probability are high-yield topics in the DSE Paper 2. We help you master the organization of data, cumulative frequency curves, measures of central tendency, and standard deviation. We also teach you how to avoid common probability traps that cause students to lose easy marks.
There are a lot of math tutorials on the internet. So, what makes this page different?
Mathematics isn't magic—it's practice and clear understanding. Whether you are aiming for a Level 5** in the DSE, or simply trying to pass with a solid grade, this blog is here to support you.
We simplify the tough stuff, so you can ace your DSE Maths.
– MathSir (Colin Chan)