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# When we're asked to count the # of factors of a certain

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Director
Joined: 12 Jun 2006
Posts: 536
Followers: 1

Kudos [?]: 29 [0], given: 1

When we're asked to count the # of factors of a certain [#permalink]  08 Apr 2007, 06:34
When we're asked to count the # of factors of a certain number do we include 1 and the # itself? (ie 9 has 4 factors 3,3,1 and 9)
Director
Joined: 30 Nov 2006
Posts: 591
Location: Kuwait
Followers: 12

Kudos [?]: 169 [0], given: 0

yes we do.

And for the integer 9, the factors are : 1, 3, 9
The integer 9 has Three factors.
Director
Joined: 12 Jun 2006
Posts: 536
Followers: 1

Kudos [?]: 29 [0], given: 1

ok. thanks. VERY careless error on my part
Manager
Joined: 28 Feb 2007
Posts: 197
Location: California
Followers: 2

Kudos [?]: 6 [0], given: 0

Re: Simple factoring question [#permalink]  08 Apr 2007, 10:29
ggarr wrote:
When we're asked to count the # of factors of a certain number do we include 1 and the # itself? (ie 9 has 4 factors 3,3,1 and 9)

Factor by definition is any number that divides the original. Since 1 and the number divide itself so they are factors.
Re: Simple factoring question   [#permalink] 08 Apr 2007, 10:29
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