Types of Numbers

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Across
  1. 1. A very famous irrational number that starts with 3.14159... .
  2. 4. Numbers that can be written as a ratio of two integers .
  3. 5. Any rational number can be written as this.
  4. 7. Numbers that cannot be written as a fraction, like the square root of two.
  5. 8. The number that was "born" to represent a basket with no apples.
  6. 9. Natural numbers plus zero [01:04].
Down
  1. 2. Numbers that include the square root of negative numbers; they aren't "fake," they are....
  2. 3. These are counting numbers like 1, 2, 3, used by Egyptians and Babylonians .
  3. 4. The set that includes all natural, whole, integers, rational, and irrational numbers
  4. 6. This group includes whole numbers and their negative counterparts.