Maths Puzzle

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Across
  1. 4. Perimeter of a Circle
  2. 5. a set of observations That occurs most frequently
  3. 7. A group of observations which is equally shared among all the observations
  4. 9. Has more than 3 terms
  5. 11. The raw data when put in ascending or descending order of magnitude
Down
  1. 1. It is a number,a variable or a combination of numbers and variables
  2. 2. The first bracket removed
  3. 3. Indian Mathematician who created the Pythagoras theorem
  4. 6. we use this to solve brackets
  5. 8. Each of the quantities multiplied together to for a term
  6. 10. the value which lies in the middle of the arranged data with half of observations below and half above it.