Which of the following is an irrational number?

  1. -5
  2. -38
  3. 144
  4. 15
Answer

D) 15

15 is irrational because 15 is not a perfect square. 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