Welcome to 2-Minute Math!

“If you can’t explain something in 2 or 3 minutes, you don’t really understand it!”

For suggestions about how to use these videos, see the ‘About’ page.

All the videos are listed below, and you can search and filter by topic.

How do I find all the factors of a number?
Number: Prime numbers
Number: Factors

What is a prime number?
Number: Prime numbers
Number: Factors

Do the prime numbers go on forever?
Number: Prime numbers
Number: Factors

How can we find prime numbers?
Number: Prime numbers
Number: Factors

How can I check whether a number is prime?
Number: Prime numbers
Number: Factors

How can I find the prime factorisation of a number?
Number: Prime numbers
Number: Factors

How can I find the highest common factor of a set of numbers?
Number: Prime numbers
Number: Factors

How can I find the lowest common multiple of a set of numbers?
Number: Prime numbers
Number: Factors

How can I find the number of factors of any number?
Number: Prime numbers
Number: Factors

What is an irrational number?
Number: Prime numbers
Number: Irrational numbers

What are equivalent fractions?
Number: Fractions

How do we add and subtract fractions with the same denominator?
Number: Fractions

How do we add and subtract fractions with related denominators?
Number: Fractions

How do we add and subtract fractions with unrelated denominators?
Number: Fractions

How do we multiply fractions?
Number: Fractions

How do we divide fractions?
Number: Fractions

How do decimals work?
Number: Decimals

How do we round to the nearest 10?
Number: Rounding

How do we round decimals?
Number: Rounding
Number: Decimals

What is standard form?
Number: Powers
Number: Rounding

What are significant figures?
Number: Rounding

How can I round a number to a certain number of significant figures?
Number: Rounding

What are percentages?
Number: Fractions
Number: Decimals
Number: Percentages

What is a ratio?
Number: Ratio

How do we add and subtract negative numbers?
Number: Negative numbers

How do we multiply and divide negative numbers?
Number: Negative numbers

What does the priority of operations mean?
Number: Calculations

How do we convert fractions into decimals?
Number: Fractions
Number: Decimals

How do we convert decimals into fractions?
Number: Fractions
Number: Decimals

What is a logarithm?
Number: Powers
Number: Logarithms

What is an imaginary number?
Number: Complex numbers
Vectors: Phasors

What is a function?
Algebra: Functions
Algebra: Graphs

How can we make a graph of a function?
Algebra: Functions
Algebra: Graphs

When does a function have an inverse?
Algebra: Functions
Algebra: Graphs

What are even and odd functions?
Algebra: Functions
Algebra: Graphs

What is a periodic function?
Algebra: Functions
Algebra: Graphs

How do arithmetic sequences work?
Number: Sequences
Algebra: Functions

How do quadratic sequences work?
Number: Sequences
Algebra: Functions

How do I factorise a monic quadratic expression?
Algebra: Quadratics
Algebra: Factorising

How do I solve a quadratic equation by factorising?
Algebra: Quadratics
Algebra: Factorising
Algebra: Equations

How do I factorise a non-monic quadratic expression?
Algebra: Quadratics
Algebra: Factorising

How do I solve a quadratic equation by completing the square?
Algebra: Quadratics
Algebra: Equations

What happens to an equation when a graph transforms vertically?
Algebra: Functions
Algebra: Graphs

What happens to an equation when a graph transforms horizontally?
Algebra: Functions
Algebra: Graphs

What is an angle?
Geometry: Angles

What are vertically opposite angles?
Geometry: Angles

What are corresponding and alternate angles?
Geometry: Angles
Geometry: Parallel lines

How do bearings work?
Geometry: Angles

What is the sum of the interior angles of a triangle?
Geometry: Angles
Geometry: Polygons
Geometry: Parallel lines

What is the sum of the interior angles of a polygon?
Geometry: Angles
Geometry: Polygons

What is the sum of the exterior angles of a triangle?
Geometry: Angles
Geometry: Polygons

What is the sum of the exterior angles of a polygon?
Geometry: Angles
Geometry: Polygons

What does the number pi have to do with circles?
Geometry: Circles
Geometry: Perimeter

How can we find the area of a circle?
Geometry: Circles
Geometry: Area

What are the sine and cosine functions?
Trigonometry: Sine and cosine
Algebra: Functions

How can we use sine and cosine to solve right-angled triangles? Part 1
Trigonometry: Sine and cosine

How can we use sine and cosine to solve right-angled triangles? Part 2
Trigonometry: Sine and cosine

What is the tangent function?
Trigonometry: Tangent
Algebra: Functions

How can we use the tangent function to solve right-angled triangles?
Trigonometry: Tangent

What is Pythagoras’ Theorem?
Trigonometry: Pythagoras’ Theorem
Geometry: Polygons

What is the cosine rule?
Trigonometry: Sine and cosine

What is the sine rule?
Trigonometry: Sine and cosine

What is Pythagoras’ Theorem in 3 dimensions?
Trigonometry: Pythagoras’ Theorem

What is the mode?
Statistics: Averages and spread

What is the median?
Statistics: Averages and spread

What is the mean?
Statistics: Averages and spread

What is the range?
Statistics: Averages and spread

What is the standard deviation?
Statistics: Averages and spread

What is a pie chart?
Statistics: Graphs

How can I make a pie chart?
Statistics: Graphs

What is a histogram?
Statistics: Graphs

What is correlation?
Statistics: Graphs

What is a cumulative frequency graph?
Statistics: Graphs

What is a gradient function?
Calculus: Differentiation

Are all functions differentiable?
Calculus: Differentiation

What is the power rule for differentiation?
Calculus: Differentiation

What are the Taylor series for the sine, cosine and exponential functions?
Calculus: Differentiation

How do we differentiate the exponential function?
Calculus: Differentiation

How do we differentiate the logarithm function?
Calculus: Differentiation

How do we differentiate the sine and cosine functions?
Calculus: Differentiation

How do I use the chain rule for differentiation?
Calculus: Differentiation

How do I use the product rule for differentiation?
Calculus: Differentiation

Why does the product rule for differentiation work?
Calculus: Differentiation

How do I use the quotient rule for differentiation?
Calculus: Differentiation

Why does the quotient rule for differentiation work?
Calculus: Differentiation

How do I decide which differentiation rule I need to use?
Calculus: Differentiation

What is implicit differentiation?
Calculus: Differentiation

What is logarithmic differentiation?
Calculus: Differentiation

What are stationary points?
Calculus: Differentiation

What does the second derivative tell us?
Calculus: Differentiation

What is integration?
Calculus: Integration

What is an indefinite integral?
Calculus: Integration

What is a definite integral?
Calculus: Integration

What is the power rule for integration?
Calculus: Integration

How do we integrate the reciprocal function?
Calculus: Integration

How do we integrate by reverse chain rule?
Calculus: Integration

What is integration by substitution?
Calculus: Integration

What is integration by parts?
Calculus: Integration

What is repeated integration by parts?
Calculus: Integration

What is cyclic integration by parts?
Calculus: Integration

What is integration by partial fractions?
Calculus: Integration

How can I find a volume of revolution?
Calculus: Integration

How can I find a surface area of revolution?
Calculus: Integration

How can I find the length of a curve?
Calculus: Integration

What is a differential equation?
Calculus: Integration

How can I solve a differential equation by separation of variables?
Calculus: Integration

How can I solve a differential equation by using an integrating factor?
Calculus: Integration

How can I find an integrating factor?
Calculus: Integration

How can I find the scalar product of the Cartesian unit vectors?
Vectors: Scalar product

How can I find the scalar product of any two vectors?
Vectors: Scalar product

How can I find the vector product of the Cartesian unit vectors?
Vectors: Vector product

How can I find the vector product of any two vectors?
Vectors: Vector product

What is proof by contradiction?
Proof: Contradiction

What is proof by induction?
Proof: Induction

How does matrix multiplication work?
Linear algebra: Equations and matrices

What is the row perspective on linear algebra?
Linear algebra: Equations and matrices

What is the column perspective on linear algebra?
Linear algebra: Equations and matrices

What is the transformation perspective on linear algebra?
Linear algebra: Equations and matrices

How can I invert a 2-by-2 matrix?
Linear algebra: Equations and matrices

What is Gaussian elimination?
Linear algebra: Equations and matrices

How can I invert a 3-by-3 matrix?
Linear algebra: Equations and matrices
No matching items
×

Thank you for your interest in Two-Minute Math.

Please take a moment to fill out this form to help with development of this resource.