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This PowerPoint, worksheet and answer key are perfect for teaching your KS3 students all about numbers and the number system. I have designed these resources to pair perfectly with the Kangaroo Maths system, but they will apply to other systems too. Key learning points covered include:

• Find prime numbers and test numbers to see if they are prime
• Find common factors of numbers
• Find the highest common factor of numbers in simple cases, including co-prime examples
• Find common multiples of numbers
• Recognise and solve problems involving the lowest common multiple
• Use linear (arithmetic) number patterns to solve problems
• Recognise and use triangular numbers
• Recognise and use square and cube numbers
• Read, write and evaluate powers
• Define and find square roots (including using the √ symbol)
• Define and find cube roots (including using the ∛ symbol), including the use of a scientific calculator
• Define and find other roots (including using the √ symbol), including the use of a scientific calculator

This is a full lesson comprising beautiful slides, a worksheet and an answer key.