Question

zero was the gift of india to the world find out about such gift that india has given to the world?

Answer 1

As I know pythagoras theorem was studied in india first. Value of Pie was first calculated by aryabhatt. Is this less. If you want to know more message me.
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Answer 2

it was discovered by aryabhatta usually spoken ,but is also believed that its discovery was made by bhaskara charya. we have wait for times to come