Question

please answer this question​

Answer 1

let n be any positive integer

by e.d.l

n=bq+r

b=5

possible remainders =0,1,2,3,4

n can be of the form 5q , 5q+1,5q+2 , 5q+3 ,5q+4

for n=5q .......n^2=25q^2

=5*5q2

=5m......{m=5q2}

solve like this for n= 5q+1, 5q +2 ,5q+3 , 5q+4. and you will not get any ans in form of 5m +2 and 5m + 3.

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