CETL-MSOR 4

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Across
  1. 5. left maths on a bridge
  2. 9. had a triangle
  3. 10. is she fond of this cloth?
  4. 12. first name of KKK
  5. 14. ???
  6. 16. here's looking at you kid, badly
  7. 17. must have had a first theorem
  8. 19. statistically ornithological?
  9. 21. co-she?
  10. 22. second name of HHH
  11. 25. or was it liebniz
  12. 26. first name of NNN
  13. 28. you can and... but he ...?
  14. 29. sounds like it's not her
  15. 30. first name of HHH
  16. 31. hardly two faced
Down
  1. 1. self-taught indian
  2. 2. FFFs last, at last.
  3. 3. hotel owner?
  4. 4. more famous in other irish matters
  5. 6. bony scot
  6. 7. cut short
  7. 8. rhymes with cows?
  8. 11. first name of MMM
  9. 12. delta man
  10. 13. first name of FFF
  11. 15. also had a theorem
  12. 18. a series sort of chap
  13. 20. Em, see squared!
  14. 23. not cane
  15. 24. trump would love this toplogist!
  16. 27. ???