Doing math.
Ability Score(s): Math
Usage: Relating to solving math-related quandaries from a specific kind. The types of math are; Algebra, Fundamentals, Geometry, and Trigonometry.
Math and its uses vary widely, however commonly its usage is beneficial as an exchange to skills requiring it. Math (Fundamentals) being helpful in money-making and dividing equal sums of cash to fellow party members, Math (Geometry) and Math (Trigonometry) are also useful in buildings and architecture while Math (Algebra) is helpful in the sciences (such as chemistry and toxicology).