prove that square of any positive integer in form of 5m +3
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ler the q would be any positive integer
b=5
:a=bq+r;0 smaller than r and shorter than b
so, r would be= 1,2,3,4
Case -1
a 2=5q
a =(5q)2
a= 25q. by taking. five as common
a= 5(5q)+3. let us assume that 5q =m where m is any integer
a=5m+3
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