* Beetee: He's described as being in his mid-thirties during the 74th Hunger Games. He was already a seasoned victor and had a reputation for being an inventor. This suggests he entered the Games relatively young, possibly in his late teens or early twenties.
* Wiress: She appears to be older than Beetee, perhaps in her late thirties or early forties. She has a reputation for being eccentric and insightful, and it's implied she has participated in several Games before.
It's important to note that there are no concrete details about their ages, so these estimates are based on observations and inferences from the books.