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Every number has 1 as a factor.

6 and 9 are not factors of 1 as they are both greater than 1 and all factors of a number are less than or equal to the number.

The least whole number with 6 and 9 as factors is the lowest common multiple of 6 and 9

lcm(6, 9) = 18

6 = 2 × 3

9 = 3²

→ Lcm = 2 × 3² = 18

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7y ago

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