lukestein’s Twitter Archive—№ 7,458

@judy_chevalier @johnjhorton I’m ok there since digits add to 6. I think I have things memorized up to 10×10, and then have a quick divisibility test in mind for {2, 3, 5, 11}. So my problems start with 91=7×13 and then 119=7×17 133=7×19 161=7×23 203=7×29 217=7×31 221=13×17 247 259 …