Ответ:

  1. НОЗ(2, 3, 4) = 12: \(\frac{1}{2}=\frac{6}{12},\quad \frac{1}{3}=\frac{4}{12},\quad \frac{1}{4}=\frac{3}{12}\).
  2. НОЗ(5, 2, 10) = 10: \(\frac{2}{5}=\frac{4}{10},\quad \frac{1}{2}=\frac{5}{10},\quad \frac{3}{10}=\frac{3}{10}\).
  3. НОЗ(6, 9, 18) = 18: \(\frac{1}{6}=\frac{3}{18},\quad \frac{5}{9}=\frac{10}{18},\quad \frac{7}{18}=\frac{7}{18}\).
  4. НОЗ(8, 6, 12) = 24: \(\frac{3}{8}=\frac{9}{24},\quad \frac{1}{6}=\frac{4}{24},\quad \frac{5}{12}=\frac{10}{24}\).