KS1 number puzzle

1234567891011121314151617
Across
  1. 2. The number of sides on a dice
  2. 4. How many eyes do you have?
  3. 5. The first 'teen' number
  4. 8. 6+3
  5. 10. 9x2
  6. 11. The 4th odd number
  7. 12. 3x5
  8. 13. 15-5
  9. 14. 5x4
  10. 15. 'Octo' means this number
  11. 16. One less than twelve
  12. 17. Sounds like 'won'
Down
  1. 1. How many legs on 2 spiders?
  2. 3. 2 x 2
  3. 5. Double six
  4. 6. 11+8
  5. 7. Half of 10
  6. 9. 8+9
  7. 12. 20-6
  8. 13. What you add to seven to make ten