Why did Aryabhata invent the number zero?

Answer 1

There is no exact reason, but math altogether would be nothing (lol) without it. Since an ancient civilization (Maybe Egypt) used nothing (or a space) to represent the digit zero, 1,001 would be written as 1 1, and 1,000,000,000 would be written as "1 " which looks like just a regular one, very difficult to read for trade and currency. So said ancient civilization created the number zero. I hope that makes sense.

Also, Egypt wasn't the first one to have a zero system, Ancient Mexican civilizations, Greece and others had it too, while being completely isolated and being in different time periods.