Guha's answer to issac's Primary 6 Maths Measurement Singapore question.

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Guha
Guha's answer
5 answers (A Helpful Person)
1st
sum of two numbers should be 28, their difference should be 1. this is not possible for integral values of x,y.
whereas sum=14, difference = 2 is possible for integral values of x,y
also, sum=7, difference = 4 is not possible for integral values of x,y.