MDC (42, 98)
42 98 | 2
21 49 | 3
7 49 | 7
1 7 | 7
1 1
2 x 7 = 14
MDC (16,28,40)
16 28 40 | 2
8 14 20 | 2
4 7 10 | 2
2 7 5 | 2
1. 7 5 | 5
1 7 1 | 7
1. 1. 1
2 x 2 = 4
MMC (10,14)
10 14 | 2
5 7 | 5
1. 1
2 x 5 x 7 = 70
