If I was living at home and didn't need to get anywhere (ie no travel costs) then I could. You can find cheap food, save on your bills by changing your lifestyle, you don't NEED a TV so licence wouldn't be an issue, and you don't NEED to go out. So I could "survive" on that amount, yes. That doesn't mean it would be an enjoyable life, I wouldn't be able to go out and would have to just have basic things- but in theory it would be possible.