Maths Crossword Puzzle

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Across
  1. 2. data available to us in an unorganized form is Called
  2. 5. graph in which pictorial representation of data using symbols
  3. 6. difference between lower class and upper class limit is
  4. 7. gives the number of times that a particular entry occurs.
  5. 8. number that can be written without a fractional component
  6. 10. is called the identity for the addition of rational numbers
  7. 11. The information collected in all such cases is called
  8. 12. jagged line used along the horizontal line in graph is called
Down
  1. 1. equal to sign(=)is missing in
  2. 3. ________inverse of 21/112 is -21/112
  3. 4. a part of number that do not include fractions, decimals, negative number
  4. 9. one or more outcomes of an experiment make an
  5. 11. name the property in which a(b+c)=ab+ac