Factors are numbers that multiply together to make another number.
For example:
A number such as 6 has 4 factors, shown on the legs of this factor spider.
The number 12 has 6 factors, shown on the legs of this factor spider.
Some factor spiders, such as the number 9, have an ODD number of legs.
These are the SQUARE NUMBER factor spiders.
Remember that 9 = 3 x 3 = 3 squared.
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