🏆 The Math Xone · Grade 8 · Towards Higher Maths

Grade 8 maths, one door at a time.

Open a chapter door, read the concepts on the whiteboard, then walk the corridor and solve the questions to clear it. 22 doors in all.

▶ Start at Door 1 See the concepts

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The Grade 8 doors

Each door is one chapter of the maths syllabus. Clear a door to earn stars; your stars are saved on this device.

Door 1 Rational Numbers Closure Property: Sum or product of two rational numbers is always a rational number Open → Door 2 Irrational Numbers Irrational numbers cannot be written as \(p/q\) where \(p\) and \(q\) are integers (\(q ≠ Open → Door 3 Integers & Absolute Value Integers include positive numbers, negative numbers, and zero (no fractions or decimals) Open → Door 4 Algebraic Expressions A term is a single part of an expression separated by \(+\) or \(-\) signs Open → Door 5 Linear Equations A linear equation has variable with highest power 1 Open → Door 6 Patterns & Sequences An arithmetic sequence has a constant difference between consecutive terms Open → Door 7 Coordinate Geometry The Cartesian plane has X-axis (horizontal) and Y-axis (vertical) Open → Door 8 Basic Geometry A point specifies a location, a line extends endlessly in both directions, and a plane is Open → Door 9 Triangles Scalene: all sides different | Isosceles: two sides equal | Equilateral: all sides equal Open → Door 10 Quadrilaterals Any four-sided closed flat shape is a quadrilateral, and its interior angles always sum up Open → Door 11 Polygons A polygon is a closed figure with straight sides Open → Door 12 Circles A circle's radius goes from the center to the edge; the diameter cuts all the way across t Open → Door 13 Transformations A translation moves a shape cleanly along a straight track without tilting it Open → Door 14 Perimeter & Area Rectangle area: \(A = l × w\) | Perimeter: \(P = 2(l + w)\) Open → Door 15 Surface Area & Volume Cube: all edges equal; 6 square faces; Volume = \(a³\); TSA = \(6a²\) Open → Door 16 Data Representation Data is collected information used for analysis Open → Door 17 Measures of Central Tendency Mean = sum of all values ÷ number of values Open → Door 18 Probability Probability measures likelihood from 0 (impossible) to 1 (certain) Open → Door 19 Ratio, Proportion and Percentages A ratio compares two quantities of the same kind: \(a : b = a/b\) Open → Door 20 Percentages Percentage means "out of 100" (per hundred) Open → Door 21 Commercial Mathematics A bill/invoice lists items, prices, taxes, and total amount Open → Door 22 Logical Reasoning Logical sequences follow a hidden rule or pattern Open →

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