Since 42 is a multiple of 7, it is automatically the LCM.
42
It is: 168
252
The LCM of 36 and 42 is 252.
The GCF is 7.
the magic sums are 15, 34, and42
1, 2, 13, 261, 2, 3, 6, 7, 14, 21, 42
30 = 5 x 6, 42 = 7 x 6. The gcf is therefore 6.
2,4,6,8,64564566,6364354555456456
The GCF is 6.
The LCM is: 7
The LCM of 7 and 49 is 49.