Numbers

123456789101112131415
Across
  1. 3. Single number
  2. 5. Divisible only by itself and one
  3. 7. Fifty percent
  4. 8. A pair
  5. 10. A square’s sides
  6. 11. Not divisible by two
  7. 13. Divisible by two
  8. 14. Four equal sides or a number multiplied by itself”
  9. 15. Century in numbers
Down
  1. 1. Fingers on a hand
  2. 2. Nothing at all
  3. 4. Two times five
  4. 6. One with six zeros
  5. 8. A trio
  6. 9. The sum
  7. 11. First in line
  8. 12. Twelve items