Question

mmc ( 18,42)
mmc ( 25,65)
mmc ( 48,12)
mmc ( 8,36 )
mmc ( 15,27)
mmc ( 9,15,6)

Answer 1

18,42: 2
9,21: 3
3,7: 3
1,7: 7
1,1  =   2.3.3.7 = 2.9.7 = 2.63 = 126
====================
25,65: 5
5,13: 5
1,13: 13
1,1         = 5.5.13 = 25.13 = 325

48,12: 2
24,12: 2
12,6: 2
6,3: 2
3,3: 3
1,1 = 2.2.2.2.3 = 16.3 = 48
----------------------------------------------------------
8,36: 2
4,18: 2
2,9: 2
1,9: 3
1,3: 3
1,1   =    2.2.2.3.3 = 8.9 = 72
---------------------------------------------------------
15,27: 3
5,9: 3
5,3: 3
5,1: 5
1,1       = 3.3.3.5 = 27.5 = 135
----------------------------------------------------------
9,15,6: 2
9,15,3: 3
3,5,1: 3
1,5,1: 5
1,1,1      = 2.3.3.5 = 2.9.5 = 18.5 = 90

Answer 2

18, 42 | 2

9, 21 | 3

3, 7 | 3

1, 7 | 7

1, 1 | 1

MMC = 2 . 3 . 3 . 7 = 126

25, 65 | 5

5, 13 | 5

1, 13 | 13

1, 1 | 1

MMC = 5 . 5 . 13 = 325

48, 12 | 2

24, 6 | 2

12, 3 | 2

6, 3 | 2

3, 3 | 3

1, 1 | 1

MMC = 2 . 2 . 2 . 2 . 3 = 48

8, 36 | 2

4, 18 | 2

2, 9 | 2

1, 9 | 3

1, 3 | 3

1, 1 | 1

MMC = 2 . 2 . 2 . 3 . 3 = 72

15, 27 | 3

5, 9 | 3

5, 3 | 3

5, 1 | 5

1, 1 | 1

MMC = 3 . 3 . 3 . 5 = 135

9, 15, 6 | 2

9, 15, 3 | 3

3, 5, 1 | 3

1, 5, 1 | 5

1, 1, 1 | 1

MMC = 2 . 3 . 3 . 5 = 90