MathPath Crossword

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Across
  1. 1. PC "brain"
  2. 4. Fish whose males bear the young
  3. 6. Warner ____
  4. 8. The only number with its letters arranged in descending alphabetical order
  5. 9. 1, 3, 6, 10, 15, 21, ...
  6. 10. Back of the neck
  7. 12. Got away
  8. 14. A number expressed in base-2 numeral system
  9. 17. The first number from 0-1000 to have the letter “a” in its spelling
  10. 18. Where MathPath was held in 2010
  11. 20. Machu Picchu builder
  12. 21. Double digit number spelt with its letters in alphabetical order
  13. 22. Demoted planet
  14. 24. March 14
  15. 25. Things that magnets and barbershops both have
Down
  1. 1. One participating in a new Summer Olympics sport in 2021
  2. 2. An animal well known to all mathpathogens
  3. 3. National park near Bar Harbor
  4. 5. Division outcomes
  5. 6. Face on the $100 bill
  6. 7. Every Country has one
  7. 11. Word with sugar or candy
  8. 13. It's below the knee
  9. 15. Fish eater's annoyance
  10. 16. Item that can be blown or thrown
  11. 19. Relative of a giraffe
  12. 21. The 38th president
  13. 23. The world, to ambitious types