For 9: 9, 18, 27, 36 and so on.
For 12: 12, 24, 36, 48 and so on.
For 18: 18, 36, 54, 72 and so on.
Common multiples include, 36, 72, 108, 144 and so on.
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There exists infinite common multiples of 9, 12 & 18.But, the least common multiple is only one which can be found by the factorization of each number:PF of 9 = 3x3PF of 12 = 2x2x3PF of 18 = 2x3x3Thus, LCM is 3x3x2x2 = 36Common multiples can be found by multiplying 36(LCM) with 1, 2, 3,...etc.
The common multiples of 6 and 9 are the infinite set of multiples of their LCM, which is 18. So the common multiples of 6 and 9 are 18, 36, 54, 72, 90, 108, 126, 144, 162, 180, and so on.
Factors: 1, 2, 3, 4, 6, 9, 12, 18, 36, -1, -2, -3, -4, -6, -9, -12, -18, -36 Multiples: -36, -72, -108 and so on.
6,12,18
Multiples of 12 are 12, 24, 36, 48, etc. Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36. Numbers that are multiples of 12 and factors of 36 are 12 and 36.