Question

dicovery of '0'

Answer 1

0 is both a number and the numerical digit used to represent that number in numerals. It fulfils a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems.

Answer 2

for more info heres a link
http://en.wikipedia.org/wiki/0_(number)

Answer 3

okk

Answer 4

It was discovered by Aryabhata.