Happy Pi Day

(Image from calculushumor.com)

Today is "Pi day," so-called because 3-14-15 represents the first five digits of Pi, the ratio of a circle's circumference to its diameter. Only an obsessive-compulsive would point out that 3-14-16 would be closer to Pi, 9 being the number after 5 in the sequence.

I can't remember phone numbers---or even four-digit passcodes---but embedded in deep long-term memory are the first nine digits of Pi, 3.14159265. How irrational!