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shawnewa2
New Member

USA
1 Posts

Posted - 09/19/2007 :  14:22:09  Show Profile
i need to know how to find the prime factorization of 825
can anyone help me with this problem.
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Subhotosh Khan
Advanced Member

USA
9116 Posts

Posted - 09/19/2007 :  14:57:28  Show Profile
quote:
Originally posted by shawnewa2

i need to know how to find the prime factorization of 825
can anyone help me with this problem.


Since the number ends with 5 - it must be divisible by 5.

Since the digits added (8+2+5=15) is divisible by 3 - it must be divisible by 3.

Divide these two factors out - show us what you get.
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