Real Numbers

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Across
  1. 2. A number that can not be written as a fraction
  2. 5. After Bangkok
  3. 6. Why?
  4. 8. The 2 in 3^2
  5. 10. The x in x = 3y - 4
  6. 12. The number after 7
  7. 14. The process of reducing the irrational part of a surd
  8. 16. Most popular website in Thailand
  9. 18. What a number needs to be multiplied by to get 1.
  10. 19. 01110010
  11. 20. Something that never changes
  12. 21. A fraction whose numerator is too big
Down
  1. 1. L
  2. 3. What can't be under a square root
  3. 4. What all rational numbers do in decimal form
  4. 7. An operation that undoes another
  5. 9. The number of square roots most numbers have
  6. 11. An expression with three terms
  7. 13. A triangle with sides 1, 2, 3
  8. 14. Most popular sport in the world
  9. 15. The bottom of a fraction
  10. 17. An expression with a highest power of two