Dumbledore's age

[severusbook4]

No: HPFGUIDX 78912

I read in a post a few weeks back that JKR (in interview) had said DD's age was around 
150, and since I am re-reading GoF I noticed what Hermione says about the judges.  
Hermione says to H & R "because all three of them were injured in the Tournament of 
1792, when a cokatrice...", if this statement is true (it was in "Hogwarts, A History") 
and the first book took place in 1990, then DD is well over 202 years old, and so are 
Madame Maxine, and Karkaroff.  I don't know if this has been posted and if it has, 
sorry for the repeat.  It seems JKR has a way of contradicting herself.  Thought you 
should know.  Also, I don't know if it could be a red herring of some sort. 

Severus "reading much closer now" Snape