Crossword Puzzle

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Across
  1. 5. Quick-thinking and clever
  2. 6. Something you like the most
  3. 7. Trustworthy and reliable
  4. 9. Improves eyesight and energy
  5. 11. Extremely excellent
Down
  1. 1. Not easy; requires hard work
  2. 2. The subject with numbers and equations
  3. 3. Unique or not the same
  4. 4. Having great knowledge
  5. 8. Able to wait calmly
  6. 10. A clue to help solve a problem