How many ten-year-olds can you beat in a fight?

Just wondering how many average 10 year olds you think you can fight off before being overwhelmed. Here are the basic terms of fighting: the kids are very angry at you, each one will fight you until they get hurt enough to quit or become unconscious, you are unarmed, and you are in a gated school playground as the battle arena. The playground is about 50 feet around, closed gate around in an octagon and closes up top like a dome. First one kid comes at you, then it adds one each time you defeat a group. Defeat 1 and 2 come, defeat the 2 then 3 come, and so on. Each group arrives by sliding down a pole into the middle playground and sliding down the slide. From there, they rush at you full force.

I feel confident in my abilities to fight. I'm pretty sure I can get to group 13, so that would be roughly give or take 70 kids if I can take a few out in that round.

What do you think?