Fun with Maths

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Across
  1. 2. Count of the English alphabet that represents 500 in Roman Numerals.
  2. 3. Fractions that have the same value of a whole.
  3. 5. If a number is cubed, how many times it is multiplied to itself?
  4. 8. The number of square units needed to cover a surface.
  5. 9. A dress cost 30rupees but it is 20%off,how much does it cost now?
  6. 12. What type of points is a triangle formed of?
Down
  1. 1. The kind of angle between East and West directions.
  2. 4. 36/40 reduced to lowest terms
  3. 6. I am a number less than 30. I am not a prime number. The product of my digits is the digit in the tenths place.
  4. 7. Lines in the same plane that are always the same distance apart.
  5. 10. The amount to which the overhead charges are added.
  6. 11. If area is 221sqm and length is 17m, what is the perimeter?