"I'd like to memorize your first seven digits."
More from YourTango: Power Women: 4 Must-Know Dating Secrets Of Successful Ladies
"The only thing that's irrational here is me not getting your number."
"I think you're cute, but I'm nervous you're just going to use me to compute the circumference of the entire universe to the accuracy of less than the diameter of a hydrogen atom. :/"
"My love for you is like pi, endless and irrational."
And, of course: "Can I pi you a drink?"
More from YourTango: Win The Classic Timbuk2 Messenger Bag!
Check out more Pi Day pickup lines on HowAboutWe: Here Are Your Awesome Pickup Lines for Pi Day
More juicy stuff from YourTango: