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The factors of 12 are:

1, 2, 3, 4, 6, 12

The factors of 18 are:

1, 2, 3, 6, 9, 18

The common factors are:

1, 2, 3, 6

The least of these is 1. There can only be one least. The next smallest is 2.

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9y ago

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