1) 48 = 2 * 2 * 2 * 2 * 3
72 = 2 * 2 * 2 * 3 * 3
120 = 2 * 2 * 2 * 3 * 5
НОД (48; 72; 120) = 2 * 2 * 2 * 3 = 24
2) 90 = 2 * 3 * 3 * 5
72 = 2 * 2 * 2 * 3 * 3
36 = 2 * 2 * 3 * 3
НОД (90; 72; 36) = 2 * 3 = 6
3) 45 = 3 * 3 * 5
135 = 3 * 3 * 3 * 5
360 = 2 * 2 * 2 * 3 * 3 * 5
НОД (45; 135; 360) = 3 * 5 = 15
4) 286 = 2 * 11 * 13
110 = 2 * 5 * 11
НОК (286; 110) = 2 * 5 * 11 * 13 = 1430
5) 15 = 3 * 5
18 = 2 * 3 * 3
21 = 3 * 7
НОК (15; 18; 21) = 2 * 3 * 3 * 5 * 7 = 630
6) 24 = 2 * 2 * 2 * 3
30 = 2 * 3 * 5
38 = 2 * 19
НОК (24; 30; 38) = 2 * 2 * 2 * 3 * 5 * 19 = 2280