LCM for 12, 16 and 18
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What's the Least Common Multiple (LCM) of 12, 16 and 18?
Answer
LCM of 12, 16 and 18 is
144
First common multiples: 144, 288, 432, …
144 is divisible by all three: 144 ÷ 12 = 12, 144 ÷ 16 = 9, 144 ÷ 18 = 8 — and 12, 9 and 8 have no factor but 1 common to all of them, so no smaller number is. As a common denominator: multiply the top and bottom of x/12 by 12 and of y/16 by 9 and of z/18 by 8.
12 = 22 × 3
16 = 24
18 = 2 × 32
| Prime | 12 | 16 | 18 | Highest power |
|---|---|---|---|---|
| 2 | 22 | 24 | 2 | 24 |
| 3 | 3 | — | 32 | 32 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 24 × 32 = 144
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See Also
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
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