Around 1900 many American educators advocated the use of objects in teaching mathematics and the sciences. R. O. Evans Company of Chicago published this set of twenty chromolithographed charts. They ...

Can you spot the connections among numbers? By Marcel Danesi, Ph.D. in Brain Workout The word arithmetic comes from Greek arithmētikē, which is itself made up of two words, arithmos “number” and ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. In the mid-19th century, Americans ...

Arithmetical Functions Associated with the Unitary Divisors of a Generalised Integer Arithmetical Functions Associated with the Unitary Divisors of a Generalised Integer (pp. 196-199) ...

THESE examples, with the exception of one paper, are taken from the author's “Arithmetical Types and Examples” recently noticed in these columns. The exercises are numerous and well graded, and in ...