Math Trick Part of the trick here is that it’s easier to deal with cube of whole numbers, but … mentally figure 9 digit cube roots: http://www.1729.com/blog/CubeRoots.html Share this:Click to share on Twitter (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)