What is a thorough method to manually generate a random number between $1$ and $100$? The other day, I got an  idea.  I would like to generate a random number between $1$ and $100$ , however by hand. You often want to use these random numbers to play games or even for practical purposes. 
And only using simple tools like a desk clock and pen and paper.
What might be a reliable way to do this?
 A: Take your paper and cut it into $100$ smaller (equal sized) pieces.  Write each of the numbers $1$ through $100$ on the pieces.  Then mix up the pieces and pick one at random.
If you don't want to do $100$ slips, use $10$ slips, labelled $0,1,...,9$.  Pick twice with replacement for the two digits.  If you get $00$, that's $100$.
A: A method I've always liked is to put down a bunch of parallel lines on paper and pick one somewhere in the middle, and count how many lines are on the left of it, and take that $\mod n$. The number of lines you start with of course depends on $n$ (it should be a lot more than $n$) but this is okay, since we don't need very high numbers $n$ anyway. In the case of $100$, we take $n=2$, $n=2$, $n=5$ and $n=5$, and construct the random number from these results.
A: You can find printable paper dice templates on the 'net:
http://www.timvandevall.com/templates/printable-paper-dice-template
If you don't a model with as many sides as you need,
you can always create your own in Blender,
then export a paper model by way of this pepakura script:
https://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Import-Export/Paper_Model
A: Step 1 : Put your hand on top of a piece of paper.
Step 2 : With the second hand, grab your pen and stab the first hand with it.
Step 3 : You bleed, look at your clock so you can tell the time of the accident when you call for help.
Step 4 : Mesure the area of paper covered in blood.
Step 5 : Compute ${\text{area of paper covered in blood}\over\text{total area of paper}}\cdot100$
Congratulation, that's how you generate a random number by hand.
