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In each of the following questions, we a...

In each of the following questions, we ask you to prove a statement. List all the steps in each proof, ang give the reason for each step.
5. If a and b positive integers, then you know that a `=bq +r, 0 £ r lt b`, where q is a whole number. Prove that HCF (a,b) =HCF (b,r).

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