Which of the following is an irrational number?

  1. 7
  2. 0.09
  3. 1.25
  4. 144
Answer

A) 7

7 is irrational because 7 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