Ta có: \(Ư(8) = \{ 1;2;4;8\}\)
\(Ư(9) = \{ 1;3;9\}\)
\(Ư(12) = \{ 1;2;3;4;6;12\}\)
\(Ư(15) = \{ 1;3;5;15\}\)
\(Ư(24) = \{ 1;2;3;4;6;8;12;24\}\)
\(Ư(16) = \{ 1;2;4;8;16\}\)
Suy ra \(ƯC(8,9) =\{ 1\}\) nên \(ƯCLN(8,9) = 1\)
\(ƯC(8,12,15) = \{1\}\) nên \(ƯCLN(8,12,15) = 1\)
\(ƯC( 24,16,8) = \{ 1;2;4;8\}\) nên \(ƯCLN(24,16,8) = 8\)
