My friend is studying a subject called 'Numerical Mathematics and Computer Algorithms'. Surely mathematics is all about 'Numbers', so is ''Numerical Mathematics' a redundant statement?
Please excuse my ignorance.
You should probably read it as Numerical Methods or Computational Mathematics.
But lots of mathematics isn't about numbers, topology, group theory, set theory - numbers (and number theory) is a small part of pure maths, although a big part of applied maths.
As @Charles said in a comment above:
So the term is not redundant. Specifically, the term refers to a specific field of mathematics:
A more concise definition is: