Maths Crossword Puzzle

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