Do archaeologists need to know mathematics?

Yes, you will need a lot of experience in mathematics.

When an archaeologist finds a site to dig they have to grid it out and label/number the grids. When something is found it is located on the grid and given a number. The location of an object is as important as what the object is. These are all forms of math, so when you are doing diagrams, charts, mapping, and graphs in math you are getting skills that you will use in archaeology. Many skills are needed in this profession as well as an understanding of history, art, the ability to read and retain information, socialology, to be able to write ( they have to publish what they found and how/why) and knowing science. Landscapes are real important and an archaeologist should be able to look at a landscape to see what is man made and what is natural. So, if you want to do this study hard and maybe you can be the next person to find a really cool thing.