Which of the following is an irrational number?

  1. -38
  2. [3]5
  3. 227
  4. 0.09
Answer

B) [3]5

[3]5 is irrational because 5 is not a perfect cube. The others can be written as pq (e.g. 49 = 7, 0.overline3 = 13). SLO M-09-A-02 · Knowledge

Mathematics MCQ · More Real Numbers MCQs · Practise