fluid intelligence

The ability to form concepts, reason and identify similarities; it is intuitive and represents the activity involved when forming new mental structures rather than making use of old ones. It includes the ability to see complex relationships and solve problems, and it can decline with age if not 'exercised'

flu·id in·tel·li·gence

(flūid in-teli-jĕns) Ability to reason quickly and think abstractly; a combination of reasoning and abstract thought