Puffs, were you a bit tired when you did that math? 1975 would be 39 years ago.
Secondly, having checked earlier posts, in particular one from a couple of days ago which was an application to another clan, it would appear this person's age is 13.
Lastly, very unimpressed by this application so far; very minimal amount of information, along with (from the little that can be seen) quite disappointing grammar.