a) 150 = 2 x 3 x 5^2
93 = 3 x 31
c.m.m.d.c = 3
b) 72 = 2^3 x 3^2
135 = 3^3 x 5
c.m.m.d.c = 3^2 = 9
c) 90 = 2 x 3^2 x 5
126 = 2 x 3^2 x 7
c.m.m.d.c. = 2 x 3^2 = 2x9 = 18
d) 92 = 2^2 x 23
230 = 2 x 5 x 23
c.m.m.d.c = 2 x 23 = 46
e) 480 = 2^5 x 3 x 5
960 = 2^6 x 3 x 5
c.m.m.d.c = 2^5 x 3 x 5 = 480