30. Exemplar exercise problems XVIII

1. Select the rational numbers from the list which are also the integers.

 

\(\frac{9}{4}\), \(\frac{8}{4}\), \(\frac{7}{4}\), \(\frac{6}{4}\), \(\frac{9}{3}\), \(\frac{8}{3}\), \(\frac{7}{3}\), \(\frac{6}{3}\), \(\frac{5}{2}\), \(\frac{4}{2}\), \(\frac{3}{1}\), \(\frac{3}{2}\), \(\frac{1}{1}\), \(\frac{0}{1}\), \(\frac{-1}{1}\), \(\frac{-2}{1}\), \(\frac{-3}{2}\), \(\frac{-4}{2}\), \(\frac{-5}{2}\), \(\frac{-6}{2}\)

 

2. Select those which can be written as a rational number with denominator \(4\) in their lowest form:

 

\(\frac{7}{8}\), \(\frac{64}{16}\), \(\frac{36}{-12}\), \(\frac{-16}{17}\), \(\frac{5}{-4}\), \(\frac{140}{28}\)