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Write any three two digit consecutive nu...

Write any three two digit consecutive numbers. Find their arithmatic mean check whether the arithmatic mean is one of those number or not?

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a,a+1,a+2
AM=`(a+a+1+a+2)/3=(3a+3)/3=a+1`
30,31,32
AM=`(30+31+32)/3=933/3=31`.
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