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To find the LCM you first need to break the numbers down into their prime factors:

32 = 2x2x2x2x2

12 = 2x2x3

Next, you identify any common factors, and cross off the duplicates. In this case both numbers have two 2s as prime factors. That leaves us with 2, 2, 2, 2, 2 and 3. Multiplying these together gives 96.

Therefore the LCM of 32 and 12 is 96.

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12y ago
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11y ago

List the multiples.

12, 24, 36, 48, 60, 72

15, 30, 45, 60, 75

The LCM is 60

Factor them.

2 x 2 x 3 = 12

3 x 5 = 15

Combine the factors, eliminating duplicates.

2 x 2 x 3 x 5 = 60, the LCM

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11y ago

Factor them.

2 x 2 x 3 = 12

2 x 3 x 5 = 30

Combine the factors, eliminating duplicates.

2 x 2 x 3 x 5 = 60, the LCM

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11y ago

Factor them.

3

2 x 5

2 x 2 x 3

Combine the factors, eliminating duplicates.

2 x 2 x 3 x 5 = 60, the LCM.

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11y ago

The Least Common Multiple (LCM) for 12 30 14 is 420.

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11y ago

By making a table of their multiples and finding the first instance where the multiples match.

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9y ago

2 x 3 x 5 = 30

2 x 3 x 7 = 42

2 x 3 x 5 x 7 = 210, the LCM

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Q: How do you figure the LCM of 12 and 30?
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