[1] The journal was established in 1975, under the name Eureka, by the Carleton-Ottawa Mathematics Association, with Léo Sauvé as its first editor-in-chief.

It took the name Crux Mathematicorum with its fourth volume, in 1978, to avoid confusion with another journal Eureka published by the Cambridge University Mathematical Society.

[2] Ross Honsberger writes that "for interesting elementary problems, this publication is in a class by itself".

[3] The journal is also known for reviving interest in Japanese temple geometry problems by publishing a series of them beginning in 1984.

[5] Since January 2019, Crux Mathematicorum became a free online publication thanks to the support of the Intact Foundation.