Since traffic is slow today, I thought to start a new thread showing funny math cartoons.
I'll start.
An old one...
Blind Date - Olde English Sketch Comedy - YouTube
$\displaystyle \text{1. Find the angle labeled with a letter.}$
Code:* * * * 80 * * * * * * 30 A * * * * * * * * ↑ Here!
$\displaystyle \text{2. Expand }(a+b)^2$
. . $\displaystyle \begin{array}{c}(a+b)^2 \\ \\ (\;a\;+\;b\,)\,^2 \\ \\ (\;\;a\;\;+\;\;b\;\;)\;\;^2 \\ \\ (\quad a\quad + \quad b\quad)\quad ^2 \end{array}$
$\displaystyle \text{3. Simplify }\,\frac{\sqrt{5}}{5}$
. . $\displaystyle \frac{\sqrt{5}}{5} \;=\;\frac{\sqrt{\rlap{/}5}}{\rlap{/}5} \:=\:\sqrt{\;\;}$
I like this one
Saw this in Paul J. Nahin book 'An Imaginary tale'
Highly recommend this book, full of mathematical treasures related to sqrt(-1)