# [Tex/LaTex] A white number inside a black circle.

symbolstikz-pgf

How to make a white number inside a black circle (the picture below)? I want to change numbers inside the black circle, of course. I use Share LaTeX. I have read some articles here but anyone are not what I would like to get. I would like to get this an article (the picture below) – the sixth answer.

Thanks for help.

\documentclass{article}