Math Puzzle

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Across
  1. 3. …................. is the symbol of subtrction.
  2. 5. {0,1,2,3,4,5,6,7,8,9,} are elements of the set of .....................
  3. 7. He founded Fibbonacci numbers.
  4. 8. fifty-six …................. by four the result is sixteen.
  5. 12. Determine the place value of 7 in 3752.
  6. 13. Its symbol is
  7. 14. …........................... include multiplier.
  8. 15. What is 54 in operation "36+18=54".
Down
  1. 1. Its symbol is the "=" sign.
  2. 2. he was the first mathematician writing a book about Algebra and he used 0 for zero at the first time.
  3. 4. Its symbol is
  4. 6. plus is the symbol of ...................
  5. 9. Numbers that are not divisible by two are called.
  6. 10. Numbers that are a multiple of two are called.
  7. 11. An ........................... number is a number that tells the position of something in a list
  8. 13. Numbers that can only be divided by itself and one are called.