\[\boxed{\mathbf{27.}}\]
\[1)\ 4,\ 2,\ 8:\]
\[428,\ 422,\ 488,\ 444,\ 442,\ 448,\ 482,\]
\[\ 424,\ 484,\ \]
\[248,\ 222,\ 224,\ 228,\ 244,\ 242,\ 282,\ \]
\[284,\ 288,\]
\[824,\ 822,\ 828,\ 842,\ 844,\ 848,\ 884,\ \]
\[882,\ 888.\]
\[2)\ 3,\ 9,\ 5:\]
\[395,\ 359,\ 399,\ 355,\ 333,\ 339,\ 335,\ \]
\[393,\ 353,\]
\[539,\ 535,\ 533,\ 595,\ 599,\ 593,\ 555,\ \]
\[553,\ 559,\]
\[935,\ 933,\ 939,\ 953,\ 959,\ 955,\ 995,\ \]
\[993,\ 999.\]