MATH

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Across
  1. 2. any collection of something
  2. 4. challenge
  3. 7. positioning
  4. 8. a material thing that can be seen and touched
  5. 9. arrangement
  6. 10. a change or difference in the condition
Down
  1. 1. the way a thing turns out
  2. 3. possible variations
  3. 5. path
  4. 6. the product of an integer and all the integers below it