>> For whatever reason, 6x7, 6x8, 7x7 and 7x8 are a persistent hole in my ability to memorize Did you learn them when you were young? Those are completely ingr

>> For whatever reason, 6x7, 6x8, 7x7 and 7x8 are a persistent hole in my ability to memorize Did you learn them when you were young? Those are completely ingrained for me.