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# Properties of prime, composite, square and triangular numbers

In this video chapter, we will be looking at Identifying and describing properties of prime, composite, square and triangular numbers.

Elaborations

• understanding that some numbers have special properties and that these properties can be used to solve problems
• representing composite numbers as a product of their prime factors and using this form to simplify calculations by cancelling common primes
• understanding that if a number is divisible by a composite number then it is also divisible by the prime factors of that number (for example 216 is divisible by 8 because the number represented by the last three digits is divisible by 8, and hence 216 is also divisible by 2 and 4)

Author: Subject Coach

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Elaborations
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- understanding that some numbers have special properties and that these properties can be used to solve problems

- representing composite numbers as a product of their prime factors and using this form to simplify calculations by cancelling common primes
- understanding that if a number is divisible by a composite number then it is also divisible by the prime factors of that number (for example 216 is divisible by 8 because the number represented by the last three digits is divisible by 8, and hence 216 is also divisible by 2 and 4)

Transcript
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