SHARPEN YOUR BRAIN

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Across
  1. 1. Secret writing code
  2. 6. Repeated arrangement
  3. 8. Ordered progression
  4. 11. Clearness of thought
  5. 12. Information gained
  6. 13. Ability to recall
  7. 14. Cell of the brain
Down
  1. 2. Question with a twist
  2. 3. System of reasoning
  3. 4. Plan of action
  4. 5. Basis for judgment
  5. 6. Challenge to solve
  6. 7. Solution to a problem
  7. 9. Hard to understand
  8. 10. Center of attention