Question

MDC (3,15)mdc(9,18) d(40)

Answer 1

a)
3,15: 3
1,5: 5
1,1       =   3

R.: mdc (3,15) = 3

b)
9,18: 2
9,9: 3
3,3: 3
1,1      =  mdc = 3.3 = 9

R.: MDC (9,18) = 9

c)

d(40) = {1,2,4,5,8,10,20,40}