Fun with Maths

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Across
  1. 1. The amount to which the overhead charges are added.
  2. 4. If a number is cubed, how many times it is multiplied to itself?
  3. 5. Count of the English alphabet that represents 500 in Roman Numerals.
  4. 6. If area is 221sqm and length is 17m, what is the perimeter?
  5. 8. The kind of angle between East and West directions.
  6. 10. 36/40 reduced to lowest terms
  7. 12. Lines in the same plane that are always the same distance apart.
Down
  1. 2. A dress cost 30rupees but it is 20%off,how much does it cost now?
  2. 3. Fractions that have the same value of a whole.
  3. 7. What type of points is a triangle formed of?
  4. 9. 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.
  5. 11. The number of square units needed to cover a surface.