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This video explains the solution to the viral math riddle “A man steals a $100 bill from a store’s register. He then buys $70 worth of goods at that store, using the $100 bill, and gets $30 change. How much money did the store lose?” A visual demonstration of how to solve this riddle is provided.

In this video we provide practice test questions and answers relating to multiplying decimals so you can test your knowledge on the topic!

The video covers the 8 laws of exponents (also known as powers or indices), ranging from multiplying exponents to fractional exponents. Explanations of why the laws work are also provided. Practice questions and answers are at the end of the video.

This video provides a range of practice questions and answers to test your knowledge on the laws of exponents, also known as indices or powers.

This video provides a brief introduction to sets and then explains the four main set theory operations of union, intersection, difference and complement. Venn diagrams are used to demonstrate the concepts. Practice questions and answers are at the end of the video.

This video explains how to find the volume of a frustum and explains what a frustum is. We also explain how to find the radius of the smaller/removed cone. There are two practice questions at the end of the video.

Order Of Rotational Symmetry Of A Circle: This short video explains why the order of rotational symmetry of a circle is infinite. This is an updated, 4K version of our previous video.

This video provides a range of maths problems for you to solve. Answers are provided.

This video provides a range of practice questions and answers for you to test your knowledge of solving equations!

This video provides a range of practice test questions and answers involving negative numbers. Pause the video while you work on each question.

In this video we go through three more magic maths tricks. Use these tricks to impress your friends, practice your arithmetic skills or as lesson starters. Examples are given to show how the maths tricks work.

This video provides four handy multiplication tips and tricks you can use when multiplying without a calculator. The tips include multiplying by 11, 5 and 99.

Zero Factorial Explained: in this video we explain why zero factorial is equal to one and use a simple combinatorics example to demonstrate this.

This video explains what nets of 3D shapes are. The video includes of range of activities which can be used during lessons or during revision.

In this video we show you how to draw 3D shapes on isometric paper. There are practice questions at the end of the video. You can download some isometric paper from here: https://nrich.maths.org/isometricpaper

In this video we will explain how to add and subtract negative and positive numbers. We also explain why subtracting a negative number results in addition etc and demonstrate these using real world examples as well as on a number line. This is a link to our YouTube video which you can use during your maths lessons. Skip to: 0:45 Adding a positive number 1:46 Subtracting a negative number 2:46 Subtracting a positive number 3:34 Adding a negative number 4:17 Summary of sign rules 4:32 Practice questions We provide free educational maths help videos to learn mathematics for school, exams revision etc. We add new videos to our channel weekly.

This video explains what a fraction is, how to write a fraction and the different types of fractions. We also explain what numerator and denominator means. Practice questions and answers are at the end of the video.

This video explains how to find the perimeter of 2D shapes such as squares, rectangles, triangles and composite shapes. A range of practice questions are at the end of the video.

This video will guide you through some practice GCSE style questions on the topic of symmetry.

This video explains what coordinates in maths are and how to plot them on a graph. Practice questions at the end of the video.