100 % Sure You Don't Have Answers Of These Two Questions

Guys these two questions related to history will definitely blow your mind

As you all know that Arya Bhatt invented zero before that counting was only upto 9. 10 ,100,1000 etc. Not invented because there was no zero

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So my first question for all of you is that Lord Ravan who had 10 heads you all know about that and he was also called as dashanant but how was that possible because zero was invented by Aryabhatta and how the people of that time know that 10 is the word which is used for that

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and one more question you all know about the Mahabharata. in this epic it was said that kauravs were 100 . Now the Question was again same

If any one of you have answer of these two questions comment them down and also like this post if you got astonished to see the two questions