Numbers

123456789101112
Across
  1. 2. Numbers not divisible by 2 (e.g., 1, 3, 5, 7, ...)
  2. 4. Numbers that cannot be written as fractions (e.g., √2, π)
  3. 7. Whole numbers, positive, negative and zero (..., -2, -1, 0, 1, 2, ...)
  4. 10. Numbers that can be written as fractions
  5. 11. The set of numbers {2, 3, 5, 7, 11, 13, 17, ...}
Down
  1. 1. Numbers with more than two factors (e.g., 4, 6, 8, 9, ...)
  2. 3. The only whole number that is not a natural number
  3. 5. The next number in this series {1, 4, _, 16, 25, ...}
  4. 6. All numbers on the number line (includes rational and irrational)
  5. 8. The number of rational numbers that are also irrational numbers
  6. 9. Also called counting numbers
  7. 12. Numbers divisible by 2 without leaving a remainder