there are 25 prime numbers are there in less than 100. 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. and sum of all these numbers is 1060.

The correct answer should be "-infinity". Because there exist prime numbers < 0. Yeah .. don't be surprised. Just google "negative prime numbers". You gets lots of results refer any one So, sum of all prime numbers = - infinity, because there are infinitely many primes less than 0 If my answer will not b accepted, I demand a clarification + a convincing argument to why my answer was rejected.

It's not about you or me ... mathematics won't be modified by either of us. And, you didn't consider anything specfic in the question. As I mentioned, I need a convincing argument against my views. And, this one was far from that. If you have a very strong reason like why -ve primes don't exist ... post them here / the debate thread Perhaps, this is the first controversial question posted after PriyaD handed over the responsibility to shabbir :p

check out the reply i made in the debate thread....it may give some argument as to why it may/may not exist....