What is intelligence?A definition of intelligence is not easily provided. The definitions between various scientists and pychologists are too far apart. Intelligence is however best explained as "problem resolvend" or "intellectual faculties".
Easily said, one could say that intelligence determines how smart a person is.
A more elaborate explaination to explain intelligence is to describe it as being the 'capacity to deal with complexity'. This means dealing with many different types of cases under time pressure.
Furthermore, it is a fact that numerous formes and categories within intelligence excist. Hence, one may find e.g. numerical sets, figure sets, analogies and syllogisms.