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KC1 Q33: NUmber Prop

Expert replies
Source: — Problem Solving |

by Night reader » Sun Feb 20, 2011 7:09 am
a,b, (different integers) <144, find HCF-?
the quickest way is dividing the required value by integers
value (<144) / x and x*b, where x is integer --> 143/ {start with 2,3,4...as two numbers must be different} 143/2 doesn't work, 142/2=71, hence a=142, b=71 and HCF=71
yellowho wrote:Is there a quick way to think about this without testing a bunch of numbers?
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