Smeets was working on her thesis in mathematics, on a subject within number theory, at Leiden University when she started the blog Wiskundemeisjes ('Math girls'), on 14 March 2006, together with Jeanine Daems. The website has been awarded in 2007 with two Dutch Bloggies.Ionica Smeets Nijgh & Van Ditmar Since 2010, the two 'math girls' ran a column in De Volkskrant for several years. Currently, Smeets writes a weekly piece titled "Ionica zag een getal" ("Ionica saw a number") in the periodical Sir Edmund (a magazine from De Volkskrant).
