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I believe that you are talking about prime factorization. It helps by doing a factorization tree.

For example... 18 can be written by using 6 x 3 . Notice the 3 isnt divisible by anything other than one and thats not even necessary. Now take the 6. We know that 2 X 3 =6. Notice that the 2 nor the 3 can be broken down any further.

So this could be 3 X 3 X 2 = 18.

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13y ago

What else can I help you with?