Thanks Guys - both these answers have great value.
I have added this question to reference material.
http://web2.0calc.com/questions/reference-material
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Since 405 ends in 5, it is divisible by 5 --
405 = 5 x 81
Since 81 = 9 x 9 --
405 = 5 x 9 x 9
Since 9 = 3 x 3 --
405 = 5 x 3 x 3 x 3 x 3
Since those factors can't be reduced:
405 = 34 x 5
Thanks Guys - both these answers have great value.
I have added this question to reference material.
http://web2.0calc.com/questions/reference-material
The reference material thread is available for everyone. It is one of the 'sticky' threads.