Number Play

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Across
  1. 3. with Digits
  2. 4. Magic Number of Kaprekar
  3. 5. Estimation
  4. 8. can Tell us Things
  5. 10. with Number Patterns
Down
  1. 1. and Winning Strategies
  2. 2. Unsloved Mystery-the Collatz Conjecture
  3. 3. of Number on the Number Line
  4. 6. Math
  5. 7. Palindromic Patterns
  6. 9. and Calendar Numbers