Question

MDC : (15,39)

MDC : (8,18)

MDC: (60,144)

MDC : (66,72)

Answer 1

a)
15,38|3
05,13|5
01,13|13
01,01

3*5*13 = 195

b)
8,18|2
4, 9|2
2, 9|2
1, 9|3
1, 3|3
1, 1|

2*2*2*3*3 = 72

c)
60,144|2
30, 72|2
15, 36|2
15, 18|2
15,  9|3
 5,   3|3
 5,  1|5
 1,  1|

2*2*2*2*3*3*5 = 720

d)
66,72|2
33,36|2
33,18|2
33, 9|3
11, 3|3
11, 1|11
 1, 1|

2*2*2*3*3*11 = 792