haha, I laughed at this xD
yes... I'm a nerd 8-)

To be honest, I'm getting tired of the rational/complex/irrational/natural number jokes.

$18 for a shirt? Is that cheap or expensive?

Hmmmm let's see now....

( sqrt(2) + sqrt(8) )^2
= sqrt(2)^2 + sqrt(8)^2 + 2( sqrt(2) * sqrt(8) )
= 2 + 8 + 2( sqrt(16) )
= 2 + 8 + 2( +/- 4 )
= 2 + 8 +/- 8

so it's either $18 or $2 :)

While this joke and its ilk are so old, really, what choice do amateur math humorists have?

pi-rate jokes? Please. Those are so 2008.

Lol.

This reminds me of when the show candid camera put up a sign next to a pile of shirts at a clothing store that said "110% Off!" They went through the confused ppl and laughed and everything. But then this one lady came on and said that she automatically knew it was a fake. They asked how, and she said "I'm a math teacher, so I'd know that 110% is impossible."

Personally, what I think she failed to think is that anything more than 100% off actually means that the "seller" pays (x-100)% to the "buyer" to purchase the product. I was mad. :D

Better yet, make a sale saying:

Our prices have 300% off and then again 300% off! :o)

Not only is it rational, it's a natural price!

[sqrt(2)+sqrt(8)]^2
=[sqrt(2)+2sqrt(2)]^2
=[3sqrt(2)]^2
=9*2
=18