- R For Statistics: Questions and Answers
- R For Statistics: Questions and Answers (2020 Edition)
- R Programming - a Comprehensive Guide
- Racconto matematico
- Raciocínio Lógico em Exercícios 2ª Edição
- Raciocínio Lógico Para Concursos
- Raciocínio Lógico para Provas e Concursos – 3ª edição
- Radicals
- Randbemerkung zu einer uralten Randbemerkung: Ein geometrischer Ansatz zum Beweis des großen Satzes ...
- Randomness Explained
- Randomness Explained
- Raspberry Pi: Beginner's Guide - Learn Raspberry Pi in Easy Steps
- Ratio & Proportion in Pictures
- Rationality
- Rationalizing Rural Area Classifications for the Economic Research Service
- Ratios / Proportions / Percent for Sixth Graders
- Ratios of the Mind
- Razionalità
- Razonamiento cuantitativo
- Razonamiento cuantitativo, 2ª edición
- Razonamiento Lógico Matemático para la toma de decisiones
- Razão áurea
- Real Analysis Step by Step Approach
- Real Analysis: Questions and Answers
- Real Analysis: Questions and Answers (2020 Edition)
- Real Computing Made Real
- Real Variables with Basic Metric Space Topology
- Real-Time Earthquake Tracking and Localisation