Days of the week (which are numbers in disguise)
Numbered roads or highways
...basically anything involving arithmetic, screws me up. It's very frustrating for me -- but I bet it's even worse for anybody who has to depend on me for any of these things. I feel like King Arthur. "One, two, five!" "Three, sir!" "Three!" *kaboom*
Thank you for your patience, anybody who's routinely impacted by this particular quirk. I'm just as annoyed at it as you are!