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Highest Common Factor HCF Lowest Common Multiple LCM

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Introduction to cube roots | Numbers and operations | 8th grade | Khan Academy

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start at 2:00

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O level Math - Numbers - Perfect squares, cubes, factors and multiples

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Example - Angle Properties of Circle Question

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Example - Angle Properties of Circle Question

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GCE O-Level E-Maths: Angle Properties of Circle Question

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GCE O-Level  E-Maths: Angle Properties of Circle Introduction

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Arc Length and Sector Area (degree and radian)

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Arc Length and Sector Area (degree and radian)

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Arc Length and Area of Sectors (radians) : ExamSolutions Maths Revision

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Properties of Angles between Parallel Lines

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Properties of Angles between Parallel Lines

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How to Learn Angles and Parallel Lines Grade 9

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Finding unknown side

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Finding unknown side lengths using Trigonometry (SOH CAH TOA)

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How to Find the Equation of a Line that Passes through 2 Points: Step-by-Step Explanation

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degree ---> rad
x pi/180
rad --> degree
x 180/pi

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Compound Interest - Easy Example + Practice

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I = Prt/100

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start 3:30 and stop 10:50
1. look at x^2 to know shape of graph (u or n)
2. sub in x=0 to find y-intercept
3. sub in y=0 to find x-intercept
4. take average of 2 x-intercept to find line of symmetry
5. to find turning point, sub in line of symmetry x value to find y coordinate

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Sketching Quadratic Graphs : ExamSolutions

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Go to http://www.examsolutions.co.uk to see the full index, playlists and more videos on sketching quadratic graphs and other maths topics

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Solve Inequality and represent on number line

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Solve Inequality and represent on number line

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Solve a Linear Inequality & Show the Solution on a Number Line

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GCSE Maths revision tutorial video. For the full list of videos and more revision resources visit www.mathsgenie.co.uk.

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GCSE Maths - What are Inequalities? (Inequalities Part 1) (2026/27 exams)

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Simultaneous Equation by Graphical method

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Simultaneous Equation by Graphical method

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stop at 2:30
1. Rearrange equation to make y the subject
2. draw a table and sub in 3 x-values to find corresponding y-values to draw the line
3. find point of intersection

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Solving simultaneous equations by substitution

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GCSE Maths Revision - Solving linear Equations (2) Involving fractions

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start at 1:20

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Change the subject of the formula(1).mp4

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using factorisation/math frame/tic tac toe method

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Beginning Algebra & Multiplying & Dividing Algebraic Fractions

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Algebraic Fractions : Simplifying a fraction : ExamSolutions

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Go to http://www.examsolutions.net/maths-revision/index.php to see the main index of maths video tutorials

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GCSE Maths - Types of Number Sequences - Arithmetic vs Geometric

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How to write a formula for a Sequence Investigating Number pattern | Beard Squared

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How to calculate percentages using the % button Casio Calculator Percentage fx-85GT PLUS fx-83GT

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What is Standard Form (also known as Scientific Notation)? (Part 1/4) (2026/27 exams)

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Converting numbers to standard form and +,-,x, / of standard form

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Converting numbers to standard form and +,-,x, / of standard form

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to find out the index n to write on 10^n   number (no. more than 1) --> SF       count no. of digits after 1st digit     number (no. less than 1) --> SF     count no. of 0 in front of 1st digit

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Using Calculator to convert numbers to standard form

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Using Calculator to convert numbers to standard form

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Change Numbers To Standard Form [Science notation] using SCI mode | Casio Calculator fx-83GTPLUS

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Algebra Basics: Laws Of Exponents - Math Antics

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Fractional Exponents (GMAT/GRE/CAT/Bank PO/SSC CGL) | Don't Memorise

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GCE O-Level E-Maths: Solving Indices Equation

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remember to label your graph with the equation of curve

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GCSE Maths - How Do You Plot A Quadratic Curve? #77

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Drawing Tangent at a point of the curve 

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Drawing Tangent at a point of the curve 

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Topics:                                        1) dot diagram, stem and leaf, box & whiskers, cum freq curve and find IQR, percentile                                           2) Mean, median, mode, Standard Deviation

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Topics:                                        1) dot diagram, stem and leaf, box & whiskers, cum freq curve and find IQR, percentile                                           2) Mean, median, mode, Standard Deviation

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You need to show the intermediate step to sub in values into SD formula

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plot point with crosses not dots

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Drawing Cumulative Frequency Graphs - Corbettmaths

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What are Mean, Median and Mode? | Statistics | Don't Memorise

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11.4 (3 of 5) Probability Example, Deck of Cards.mp4

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Algebra 3 - Venn Diagrams, Unions, and Intersections

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GCSE Tutorial - Set Notation and Venn Diagrams - Shading, Intersections (higher and foundation)

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Exterior Angle Sum - Visual or Gemetrical proof - Sum External Angles equals 360 degrees

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Angle sum of any polygon - Maths Tutorials

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eMath: Ratio of Volumes of Similar Solids

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Multiplying and dividing algebraic fractions

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Maths Made Easy! Pythagoras theorem: Basics [O&U Learn]

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GCE O-Level E-Maths: Angle Properties of Circle Question

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Expressing One Quantity as a Percentage of Another Quantity 

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Expressing One Quantity as a Percentage of Another Quantity 

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Expressing One Quantity as a Percentage of Another

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Congruence and similarity — Basic example | Math | SAT | Khan Academy

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Angle of Elevation/Angle of Depression Problems

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E 1 Comparing Two Quantities by Percentage

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How to find bearing

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Maths Help: Finding Bearings - VividMath.com

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Probability without Replacement Tree Diagram

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How to solve bearing

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How To: Bearings Problem - VividMath.com

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Sets and Notation  (HD LINK IN DESCRIPTION)

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Volume and surface area

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The surface area is the area that describes the material that will be used to cover a geometric solid. When we determine the surface areas of a geometric solid we take the sum of the area for each geometric form within the solid.

The volume is a measure of how much a figure can hold and is measured in cubic units. The volume tells us something about the capacity of a figure.

A prism is a solid figure that has two parallel congruent sides that are called bases that are connected by the lateral faces that are parallelograms. There are both rectangular and triangular prisms.

To find the surface area of a prism (or any other geometric solid) we open the solid like a carton box and flatten it out to find all included geometric forms.

To find the volume of a prism (it doesn't matter if it is rectangular or triangular) we multiply the area of the base, called the base area B, by the height h.

$$V=B\cdot h$$

A cylinder is a tube and is composed of two parallel congruent circles and a rectangle which base is the circumference of the circle.
Example
The area of one circle is:

$$A=\pi r^{2}$$

$$A=\pi \cdot 2^{2}$$

$$A=\pi \cdot 4$$

$$A\approx 12.6$$

The circumference of a circle:

$$C=\pi d$$

$$C=\pi \cdot 4$$

$$C\approx 12.6$$

The area of the rectangle:

$$A=C\cdot h$$

$$A=12.6 \cdot 6$$

$$A\approx 75.6$$

The surface area of the whole cylinder:

$$A=75.6+12.6+12.6=100.8\, units^{2}$$

To find the volume of a cylinder we multiply the base area (which is a circle) and the height h.

$$V=\pi r^{2}\cdot h$$

A pyramid consists of three or four triangular lateral surfaces and a three or four sided surface, respectively, at its base. When we calculate the surface area of the pyramid below we take the sum of the areas of the 4 triangles area and the base square. The height of a triangle within a pyramid is called the slant height.

The volume of a pyramid is one third of the volume of a prism.

$$V=\frac{1}{3}\cdot B\cdot h$$

The base of a cone is a circle and that is easy to see. The lateral surface of a cone is a parallelogram with a base that is half the circumference of the cone and with the slant height as the height. This can be a little bit trickier to see, but if you cut the lateral surface of the cone into sections and lay them next to each other it's easily seen.

The surface area of a cone is thus the sum of the areas of the base and the lateral surface:

$$A_{base}=\pi r^{2}\: and\: A_{LS}=\pi rl$$

$$A=\pi r^{2}+\pi rl$$
Example
$$\begin{matrix} A_{base}=\pi r^{2}\: \: &\, \, and\, \, & A_{LS}=\pi rl\: \: \: \: \: \: \: \\ A_{base}=\pi \cdot 3^{2} & & A_{LS}=\pi \cdot 3\cdot 9\\ A_{base}\approx 28.3\: \: && A_{LS}\approx 84.8\: \: \: \: \: \\ \end{matrix}$$

$$A=\pi r^{2}+\pi rl=28.3+84.8=113.1\, units^{2}$$

The volume of a cone is one third of the volume of a cylinder.

$$V=\frac{1}{3}\pi \cdot r^{2}\cdot h$$
Example
Find the volume of a prism that has the base 5 and the height 3.

$$B=3\cdot 5=15$$

$$V=15\cdot 3=45\: units^{3}$$

Video lesson

Find the surface area of a cylinder with the radius 4 and height 8

Find the volume of a cone with height 5 and the radius 3

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The surface area and the volume of pyramids, prisms, cylinders and cones (Geometry, Area) - Mathplanet

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The surface area is the area that describes the material that will be used to cover a geometric solid. When we determine the surface areas of a geometric solid we take the sum of the area for each geometric form within the solid.

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GCSE Revision Video 32 - Probability trees

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symmetry properties of circles - Chords and Tangents

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symmetry properties of circles - Chords and Tangents

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Coordinate geometry, basic intro and examples

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Coordinate geometry, basic intro and examples

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Scalar Multiplication of Matrices and Matrix Operations

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Everything About Circle Theorems - In 3 minutes!

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0:00 / 2:51•Watch full video

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Sine Or Cosine Rule? | Trigonometry | Maths | FuseSchool

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How To Multiply Matrices - Quick & Easy!