Mathematician (5e Feat)
From D&D Wiki
You are highly skilled in matters of quantitative reasoning, especially in the subjects of geometry, probability, and arithmetic, granting you the following benefits:
- Increase your Intelligence score by 1, to a maximum of 20.
- You gain proficiency in cartographer's tools, dice sets, and playing card sets, if you don’t already have them.
- You have advantage on Intelligence and Wisdom checks to judge amounts and solve mathematical problems.