Random numbers are everywhere from computer games to lottery systems, graphics software, statistical sampling, computer simulation and cryptography. Graphic below is a quick explanation to how the random numbers are generated and why they may not be truly random. 

[![](/guides/random-numbers.png)](/guides/random-numbers.png)

Here is the [original tweet](https://twitter.com/kamranahmedse/status/1237851549302312962) where this image was posted.