Cryptic Maths Crossword

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Across
  1. 2. ChatGPT
  2. 3. Empty,Sifr, Zevero
  3. 5. x marks the spot
  4. 7. Tintin, Haddock and the Professor
  5. 8. Spy Agency or a Kolkata Landmark
  6. 9. At the beach, a vertical measurement divided by a horizontal measurement
  7. 11. Likelihood, Probability, Stake
Down
  1. 1. Sum of the previous two is the current term
  2. 4. Imitation Games
  3. 6. "Elements", Father of Geometry
  4. 10. Real and Imaginary