1.- M.C.M.(30,36) = 180s
180s = 3min
2.-M.C.D(70,42)
70 = 1,2,3,6,7,10,14,35,70.
42 = 1,2,3,6,7,14,21,42.
3.-M.C.M.(12,18,60) = 2^2*3^2*5 = 180s.
12 = 2^2*3*1
18 = 2*3^2*1
60 = 2^2*3*5*1
4.- A = 3*5 = 15m^2
M.C.D. 15 = 1,3,5,15.
5.-M.C.M.(250,360,540) = 10.
250 = 1,2,5,10,25,50,125,250.
360 =
1,2,3,4,5,6,8,9,10,12,15,18,20,24,30,36,40,45,60,72,90,120,180,360.
540 =
1,2,3,4,5,6,9,10,12,15,18,20,27,30,45,54,60,90,108,135,180,270,540.