Good
astute - Ability to understand things quickly and clearly, and to use the knowledge well
From a very early age, Gail instinctively knew everything about business, and and after college she proved to be an astute business woman, and became a millionaire before the age of 30.
Scrutinize - To look at something in great detail, often to understand it better or to detect any flaws or issues.

The detective carefully scrutinized the evidence he had gathered, trying to find a clue that might help him figure out who committted the crime.