Math

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Across
  1. 3. sum of the first 8 primes
  2. 5. Hint3
  3. 8. HInt6
  4. 12. Hint9
  5. 14. twin prime pairs less than 20
Down
  1. 1. Hint10
  2. 2. permutations of Math
  3. 4. prime of the form 2^n-1
  4. 6. Hint4
  5. 7. Hint2
  6. 9. HInt5
  7. 10. Hint8
  8. 11. Hint1
  9. 13. Hint7