One of the coolest things that ramanujan created was his magic square. Some of the coll properties that the square holds is that the sum of an column is 139, the sum of any row is 139, the sum of the diagnal elements is 139, and the sum of any 2x2 box is 139, excluding the , middle two columns. What is even more interesting about this magic sqaure is that the very top row is ramanujan's birthday/international mathematics day. Below I have provided a link explaining how to create your own magic sqaure!