Mathmania (crossword set -1)

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Across
  1. 2. smallest whole number
  2. 4. circles with common center
  3. 9. In a triangle it is the line segment drawn from a vertex to the midpoint
  4. 10. who invented zero
  5. 11. 16-4÷1/4 + 4
  6. 16. father of mathematics?
  7. 18. x+x=60,y+y=20,z+z=4,x+y÷z=?
  8. 19. 2+3=8,3+7=27,4+5=32,5+8=60,6+7=72,7+8=??
  9. 20. ANGLES WHOSE SUM IS 180
  10. 23. four times multiplied by the length of the side of the polygon is the perimeter of the polygon known as
  11. 24. Another word for height
  12. 25. who discovered first infinite series problem
Down
  1. 1. sum of the digits of the Ramanujan number?
  2. 3. A polygon with seven sides and seven angles.
  3. 5. length*breadth*height
  4. 6. mathematical theorem for rightangled triangle
  5. 7. MATHEMATICAL CONCEPT DEALING WITH NUMBER OF POSSIBLE ARRANGEMENTS?
  6. 8. Two lines that intersect to form four right angles.
  7. 12. 56 times ¼
  8. 13. A three termed polynomial
  9. 14. the number by which the dividend is being divided
  10. 15. Two numbers whose product is 1
  11. 17. Having the EXACT same size and shape.
  12. 21. ratio of sine and cosine
  13. 22. Reciprocal of sine