MIND GYM

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Across
  1. 6. Plan of action
  2. 8. Logical thinking
  3. 11. Number puzzle game
  4. 13. Related to the mind
  5. 14. Repeated design
  6. 15. Ability to recall
Down
  1. 1. Challenge to solve
  2. 2. Center of attention
  3. 3. Ordered arrangement
  4. 4. Mark with meaning
  5. 5. Hard puzzle
  6. 7. Question with a twist
  7. 9. Solution to a problem
  8. 10. Sentence to ask
  9. 12. Secret code