Just as a matter of curiousity, how old was Voldemort when he died and what year was he born? My estimate is 71: he was 16 when Myrtle died, fifty years before the Chamber was reopened, so that's 66. Now he was killed five years later, making him 71, but I could be wrong.

Also, by chance, does anyone know how old Dumbledore is? My guess is around 90-120, mostly based on the year he defeated Grindelwald