I'm not sure if his age was ever made clear. I think there is a spin-off about him, but I'm not so sure as to how it relates to the main narrative.

How old is Han Tzu aka "Hot Soup" in Ender's Game?
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<sub>Inspired by [this question](http://scifi.stackexchange.com/questions/114983/how-old-is-finn).</sub>