Ответ:
1) Двузначные числа: 12, 21, 13, 31, 14, 41, 15, 51, 23, 32, 24, 42, 25, 52, 34, 43, 45, 54.
18 чисел
2) Трехзначные числа. 123, 132, 124, 142, 125, 152, 134, 143, 135, 153, 145, 154, 213, 231, 214, 241, 215, 251, 234, 243, 235, 253, 245, 254, 312, 321, 314, 341, 315, 351, 324, 342, 325, 352, 345, 354, 412, 421, 413, 431, 415, 451, 423, 432, 425, 452, 435, 453, 512, 521, 513, 531, 514, 541, 523, 532, 524, 542, 534, 543.
60 чисел
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Ответ:
1) Двузначные числа: 12, 21, 13, 31, 14, 41, 15, 51, 23, 32, 24, 42, 25, 52, 34, 43, 45, 54.
18 чисел
2) Трехзначные числа. 123, 132, 124, 142, 125, 152, 134, 143, 135, 153, 145, 154, 213, 231, 214, 241, 215, 251, 234, 243, 235, 253, 245, 254, 312, 321, 314, 341, 315, 351, 324, 342, 325, 352, 345, 354, 412, 421, 413, 431, 415, 451, 423, 432, 425, 452, 435, 453, 512, 521, 513, 531, 514, 541, 523, 532, 524, 542, 534, 543.
60 чисел