Answer:

60 3-digit positive integers can be formed using any number of digits from 1, 2, 3, 4, 5 without repetition.

Step-by-step explanation:

123, 124, 125,

132, 134, 135,

142, 143, 145,

152, 153, 154,

213, 214, 215,

231, 234, 235,

241, 243, 245,

251, 253, 254,

312, 314, 315,

321, 324, 325,

341, 342, 345,

351, 352, 354,

412, 413, 415,

421, 423, 425,

431, 432, 435,

451, 452, 453,

512, 513, 514,

521, 523, 524,

531, 532, 534,

541, 542, 543