Maths holiday homework

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Across
  1. 4. the name 'quadratic' has been derived from the word
  2. 5. the sum or difference of rational and an irrational number
  3. 7. a pair of linear equations having no solution is called
  4. 12. An event having only one outcome is called
  5. 13. if p and q are two distinct prime numbers, then their HCF is
  6. 15. there are how many positive primes
Down
  1. 1. a polynomial of degree 3 is called
  2. 2. The probability of an impossible event is
  3. 3. If a pair of linear equations is inconsistent then lines representing them are
  4. 6. if lines intersect in a single point then the solution is
  5. 8. an event with probability 1 is called
  6. 9. a cubic polynomial can have almost how many zeroes
  7. 10. numbers which only have two factors, i.e. 1 and the number itself
  8. 11. numbers which have more than 2 factors
  9. 14. which numbers can be written in the the form p/q, where p and q are integers and q= 0