All dragons have skill points equal to (6+INT modifier , minimum 1) x (Hit Dice+3).
Most dragons purchase the following skills at the maximum ranks possible:-
The remaining skills points are generally spent (at the cost of 1 skill point per rank) on:-
All these skills listed are considered Class skills for dragons. (Each dragon has other class skills as well, as noted in their descriptions.)
Based on the entry in Dungeons & Dragons Monster Manual 3.5