Use of applied mathematics during hiring process for developers

What skills a developer is able to demonstrate while solving a math task during job interview?

  1. ability to solve a math task during an interview.
  2. -
  3. Math skills. An ability to shift his train of thought (from interview to problem), maybe.
  4. intelligence, logic thinking
  5. analitical and logical thinking
  6. Algebra, analytic thinking
  7. Logic, reasoning, quick thinking
  8. Algorithmic analysis of a math problem
  9. arithmetic, algebra, geometry and boolean logic