Respuesta :

We shall proceed in hit and trial method

Find some nearest multiples of 252

  • 252(2)=504
  • 252(3)=756
  • 252(4)=1008
  • 252(5)=1260
  • 252(6)=1512
  • 252(7)=1764

Yes last one is square of 42

So smallest no is 7