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 Post subject: Factoring DrillPosted: Fri Sep 24, 2010 2:12 pm

Joined: Fri Sep 24, 2010 12:47 pm
Posts: 1
I understand what a prime factor is, but in the factoring drill, the same number is often repeated. For example, for 56, it lists 2,2,2,and7. Why does it list 2 3 times?

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 Post subject: Re: Factoring DrillPosted: Sun Sep 26, 2010 2:09 pm

Joined: Thu Feb 12, 2009 6:32 pm
Posts: 497
There are two terms at work here.

The prime factorization of 56 is 2 2 2 7
The prime factors of 56 are 2 2 2 7
The unique prime factors of 56 are 2 and 7

In a typical GMAT problem, you'll know which they're seeking and be able to answer the question appropriately.

Hope this helps!

Veritas Help

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