series crossword!

1234567891011
Across
  1. 4. problem5
  2. 7. problem3
  3. 9. problem10
  4. 11. problem2
Down
  1. 1. problem6
  2. 2. problem7
  3. 3. problem11
  4. 5. problem4
  5. 6. problem9
  6. 8. problem1
  7. 10. problem8