(1 способ)
1) 15 и 9. = 45
15| 3 9 | 3
5 | 5 3 | 3
1 | 1 1 | 1
3*5*1*3=45
2) 6 и 30 = 30
6 | 2 30 | 5
3 | 3 6 | 2
1 | 1 3 | 3
1 | 1
2*3*1*5= 30
(2 способ)
1) 15 и 9 = 45
15: 15, 30, 45, 60....
9: 9, 18, 27, 36, 45 ....
HOK = 45
2) 6 и 30 = 30
6: 6, 12, 18, 24, 30...
30: 30, 60...
HOK = 30