a) 195 = 3 × 5 × 13
260 = 2² × 5 × 13
c.m.m.m.c ( 195, 260 ) = 2² × 3 × 5 × 13 = 780
b) 1122 = 2 × 3 × 11 × 17
714 = 2 × 3 × 7 × 17
c.m.m.m.c ( 1122, 714 ) = 2 × 3 × 7 × 11 × 17 = 7845
c) 3500 = 2² × 5³ × 7
7490 = 2 × 5 × 7 × 107
c.m.m.m.c ( 3500, 7490 ) = 2² × 5³ × 7 × 107 = 374500
d) 3220 = 2² × 5 × 7 × 23
4060 = 2² × 5 × 7 × 29
c.m.m.m.c ( 3220,4060 ) = 2² × 5 × 7 × 29 × 23 = 93380