Ancient Chinese mathematicians used red and black counting rods to show:

  1. prime and composite numbers
  2. fractions and decimals
  3. positive and negative numbers
  4. even and odd numbers
Answer

C) positive and negative numbers

Red rods stood for positive and black rods for negative numbers — one of the earliest uses of negative numbers. SLO M-09-A-01 · Knowledge

Mathematics MCQ · More Real Numbers MCQs · Practise