- K-theory
- Karl Marx and Mathematics
- Kernel Functions and Elliptic Differential Equations in Mathematical Physics
- Kernel Smoothing
- Key Ideas in Teaching Mathematics: Research-based guidance for ages 9-19
- Key Ideas on Randomness
- Key Skills Application of Number Level 2
- Key Skills/Adult Literacy Communications Level 1
- Key Stage 2 & Key Stage 3 Maths
- Key Stage 2 and Key Stage 3 Mathematics
- Key Stage 3 Maths Interactive Practice Papers
- Kibena and The Math Rats
- Kibena and The Math Rats
- Kids Math - First Grade
- Kids Math Grade 2
- Kindergarten Math Book
- Kinematics of General Spatial Mechanical Systems
- Kitten
- Kleine Einführung in die Harmonik
- Kniha plná Hlavolamov, Hádaniek a Optických ilúzií
- Knock-Out Blackjack Revised and Expanded
- Knot Projections
- Knot Theory
- Knowing and Teaching Elementary Mathematics
- Knowledge and the Philosophy of Number
- Knowledge, Number and Reality
- Kochański and the Circle
- Komplexität
- Konštruktivizmus vo výchove a vzdelavaní pre každého
- Kritik an Black Swan
- Kronecker Products and Matrix Calculus with Applications
- Książka o Niczym
- Kwadraten, wortels en letters
- Kwadratura koła. Ekierka Binga