I can explain how to identify a prime number or a composite number.
I can explain how to identify a prime number or a composite number.
Factor - A factor is a whole number which exactly divides another whole number.
Prime number - A prime number is a whole number greater than one which has exactly two factors.
Composite number - A composite number is a whole number which has more than two factors.
Square number - A square number is the result of multiplying an integer (not a fraction) by itself.
Every number has one and itself as a factor, so every number is a prime number.
Ensure pupils explore the different arrangements that numbers can make with tiles in arrays. Point out that the numbers which cannot be arranged in any way except for one row or column are prime numbers.
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2$$^2$$ -Â 4
3$$^2$$ -Â 9
11$$^2$$ -Â 121
8$$^2$$ -Â 64
Prime number -Â 13
Composite number -Â 12
Square number -Â 16
