Number System Crossword Puzzle

12345
Across
  1. 1. numbers which can be represented in the form of p/q
  2. 3. numbers starting from 1 till infinity
  3. 4. whole numbers which can be positive, negative, or zero
  4. 5. numbers starting from 0 till infinity
Down
  1. 1. the collection of all rational and irrational numbers
  2. 2. numbers which can’t be represented as rational numbers