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Multiples

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The product (result) of multiplying two whole numbers.

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Factors

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A number (or expression) that is multiplied by another to yield a product.

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Product

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The result obtained by multiplying two numbers.

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Prime number

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A whole number greater than 1 whose only factors are 1 and itself. (It has 2 factors)

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Composite number

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A number exactly divisible by at least one whole number other than 1 and itself. (It has more than 2 factors)

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Factor tree

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A way of mapping out factors of numbers to find out the prime factors.

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Even

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A multiple of 2.

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Odd

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A whole number that is not a multiple of 2.