Who discovered magic squares and how?

Answer 1

once in china, a turtle arrived at a river bank and people noticed that it was having some designs on its back . these designs then turned into magic square

Answer 2

Magic squares were discovered by ancient Chinese mathematicians around 2200 BCE. The exact identity of the person who discovered them is unknown as the discovery predates recorded history. However, it is believed that magic squares were used for divination purposes and as a form of numerological and mystical practice in ancient China.