Problem: Number systems

Problem

Which of the number systems \(N, Z, Q, R\) does the following numbers belong to. List them all, for example \(-3\) belongs to \(Z, Q, R\)

  1. \(π/3\)
  2. 2017
  3. \(-3/2\)
  4. \(\sqrt{16}\)
  5. The golden ratio, \((1+\sqrt{5})/2\)

Solution

Note that d) is equal to 4 which is also a natural number, an integer and a rational number