Pi

Pi

As every school student knows, Pi (π) is the ratio between the diameter and the circumference of a circle.

In most calculations, 22/7 is close enough, but you can learn its value to 14 places (3.14159265358979) by memorizing the sentence:

“Now I want a drink, alcoholic, of course, after the heavy chapters involving quantum mechanics.”
--Sir James Jeans

The length of each word corresponds to the digits of pi.
To 30 places: 3. 1415926535897932384626433832795

‘How I wish I could recapture my memory about Sir Jeans’ diabolic mnemonics! However, invention now of any reliable, easy phrase is beyond what shy and fumbling aid my present intellect knows”
--by Bill Powers