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Number and properties
Practice...
What are the factors of 24?
Which numbers up to 20 have factors 3 and 6?
Practice...
Factors
Factors
Factors are numbers we can multiply together to get another number: Example: 2 and 3 are factors of 6, because 2 × 3 = 6. A number can have MANY factors!
Multiples
Multiples
When you learned your times tables, you were learning multiples. For example, 2, 4, 6, 8, and 10 are multiples of 2. To get these numbers, you multiplied 2 by 1, 2, 3, 4, and 5, which are integers. A multiple of a number is that number multiplied by an integer.
Practice...
What are the multiples of 7 below 50?
What are the multiples of 3 between 40 and 50?
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Prime numbers
Prime Numbers
A number that is divisible only by itself and 1 (e.g. 2, 3, 5, 7, 11)
Practice...
How many prime numbers can you list above 20?
Which of these are not prime numbers? 12, 13, 15, 17, 19, 21
Practice...
Square and Cube numbers
Square and cube numbers
A square number is the product of a number multiplied by itself
A cube number is a number that is the product of three numbers which are the same. In other words, if you multiply a number by itself and then by itself again, the result is a cube number.