Patterns in Mathematics

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Across
  1. 1. a two digit square number which is also a triangle number
  2. 3. 2-digit cube number which is also a square number is
  3. 6. of line segments are there in a 4th Koch snowflake?
  4. 8. smallest odd 3-digit square number is
  5. 10. number of triangles in 17th stacked triangle
Down
  1. 2. of little triangles in a triangle stack with 8 patitions on each side is
  2. 3. smallest even triangular number is
  3. 4. square of 6th Virahanka number starting with 1,2,... is
  4. 5. number of vertices of a complete graph with 36 edges is is
  5. 7. difference between 3rd hexagonal and hexagonal centred number is
  6. 9. the number of vertices of a complete graph is 7,then number of its edges is