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12.
15
1, 2 1, 2, 3, 6
The LCM of 4 and 6 is 2
The GCF of 4 and 6 is 2.
60
30
150
1
12 4 has factors 2, 2 6 has factors 2, 3 The LCM would therefore be 2x2x3
2,3,4,and6
45 + 6 = 51