SUnknownMegaFavNumbers: 80,846,126 Thu, Aug 27, 2020 Fran is trying to choose a number larger than a million to be her new favorite number. Now she wants to know if there is anything special about it. 0 /10
SUnknownWhy does the 9's trick work??? Thu, Sep 17, 2020 After explaining why divisibility rules for the factors 3 and 9 work, Fran shows how easy it is to create a divisibility rule of any factor. 0 /10
