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现在参加这个测试
Which numbers are irrational?
  • 1. pi = 3.14259...
A) irrational
B) rational
  • 2. ?2
A) rational
B) irrational
  • 3. 2.3
A) irrational
B) rational
  • 4. 4.56
A) rational
B) irrational
  • 5. 2/3
A) rational
B) irrational
  • 6. ?3
A) rational
B) irrational
  • 7. ?4
A) irrational
B) rational
  • 8. ?13
A) irrational
B) rational
  • 9. 3.333333...
A) irrational
B) rational
  • 10. ?25
A) irrational
B) rational
  • 11. 2.5
A) rational
B) irrational
  • 12. .101001000100001...
A) irrational
B) rational
  • 13. .12121212...
A) rational
B) irrational
  • 14. 4/5
A) irrational
B) rational
  • 15. ?80
A) rational
B) irrational
  • 16. ?81
A) rational
B) irrational
  • 17. .66666...
A) irrational
B) rational
  • 18. .1385835726...
A) rational
B) irrational
  • 19. .876454545...
A) irrational
B) rational
  • 20. ?121
A) irrational
B) rational
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Multiplying with Exponents
Properties Matching
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