Xiao Zhang, Xiao Li and Xiao Wang live in a dormitory. Each of the three of them has only one sister, and they are all better than their own. Go ahead.

You still lack some conditions for this problem. The main thing is that your question is also missing. I don't know what question you are asking.

However, according to your incomplete conditions, because Xiao Zhang+Xiao Li =52 and Xiao Li+Xiao Li =54, we can know that Xiao Li is two years older than Xiao Zhang and Xiao Zhang is nine years older, so Xiao Li is older than 1 1 year, so we can preliminarily judge that they are brother and sister (according to the fact that all three are older than sisters 1 1)