BTS: Do you know how old V, RM, Jungkook, J-Hope, Jimin, Jin and Suga were when they had debuted?

We bet that even the most hardcore BTS fan would find it difficult to tell how old V, RM, Jungkook, J-Hope, Jimin, Jin and Suga were when they had debuted in the group, not only because of how little of that data is available anywhere, but also because of the multiple statistics reported in the rare cases that they're available