Unsolved Problems in Number Theory

Unsolved Problems in Number Theory may refer to:


 * Unsolved problems in mathematics in the field of number theory.
 * A book with this title by Richard K. Guy published by Springer Verlag:
 * First edition 1981, 161 pages, ISBN 0-387-90593-6
 * Second edition 1994, 285 pages, ISBN 0-387-94289-0
 * Third edition 2004, 438 pages, ISBN 0-387-20860-7

Books with a similar title include:
 * Solved and Unsolved Problems in Number Theory, by Daniel Shanks
 * First edition, 1962
 * Second edition, 1978
 * Third edition, 1985, ISBN 0-8284-1297-9
 * Fourth edition, 1993
 * Old and New Unsolved Problems in Plane Geometry and Number Theory, by Victor Klee and Stan Wagon, 1991, ISBN 0-88385-315-9.