Math From Scratch 16: Divisibility Rules (for base 10) December 1, 2011 The results for testing numbers for divisibility in base 10 are laid out here. It appears we’ll be reaching the rational numbers at some point in the spring of 2012. Share this:Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)