a) 24 = 2^3 * 3
60 = 2^2 * 3 * 5
C.m.m.m.c.(24,60) = 2^3 * 3 * 5 = 120
C.m.m.d.c.(24,60) = 2^2 * 3 = 12
b) 144 = 2^4 * 3^2
432 = 2^4 * 3^3
1008 = 2^4 * 3^2 * 7
C.m.m.m.c.(144,432,1008) = 2^4 * 3^3 * 7 = 3024
Cm.m.m.d.c.(144,432,1008) = 2^4 * 3^2 = 144