Crossword Puzzle using the names of famous Indian Mathematicians

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Across
  1. 4. Discovered a version of Pascal's Triangle.
  2. 5. Invented zero
  3. 7. first to write numbers in the Hindu Decimal System.
Down
  1. 1. DEVI Popularly known as 'Human Calculator'
  2. 2. Wrote the first work with full and systematic use of decimal number system.
  3. 3. Author of Brahmaphutasiddhanta and Khandakhadyaka.
  4. 6. FAMOUS FOR THE THE CONTRIBUTION TO NUMBER THEORY AND INFINITE THEORY.