? on Dumbledore's real age?

[Jessica]

No: HPFGUIDX 54019

I am on my third time around in the Potters series. Something hit me. 
I know the time line states that he is probably 150 years old. But 
how can this be, if he help Nicholas Flamel with the Stone? Flamel is 
over 650 years old. I am I missing something. I do not think he would 
use the stone on himself,because the stone was distroyed. But still 
confused. Hope you can help, Thanks.Jessica