How would i go about working out the highest common facteor of 88, 20 and 7??

How would i go about working out the highest common facteor of 88, 20 and 7??

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ok well the first thing I notice about this question is that 7 is a prime number (it can only be divided by itself and 1) so given that we can't divide 88 or 20 by 7, then the highest common factor of all of them has to be 1
chloe
12 May 2011
woaah you are SMART! im only in s1 and im a bit of a drip at maths :/ :)
starinthehood
12 May 2011
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