With almost sincere apologies

[ewx]

Comments

[lethargic-man.livejournal.com]

Why? (I.e., what obvious humour point am I missing?)

[ewx.livejournal.com]

A stylized Q is used to denote rational numbers (http://mathworld.wolfram.com/RationalNumber.html). The square root of 2 is a well-known example of an irrational number.

[nassus.livejournal.com]

Math geek ;-p
Nicely done though *grin*

[pm215]

Ah. I thought the point was that assuming the circumference was a rational number the line across it couldn't be the right length and also rational...