LCM for 12, 18 and 36
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What's the Least Common Multiple (LCM) of 12, 18 and 36?
Answer
LCM of 12, 18 and 36 is
36
First common multiples: 36, 72, 108, …
36 is divisible by all three: 36 ÷ 12 = 3, 36 ÷ 18 = 2, 36 ÷ 36 = 1 — and 3, 2 and 1 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 3 and of y/18 by 2.
12 = 22 × 3
18 = 2 × 32
36 = 22 × 32
| Prime | 12 | 18 | 36 | Highest power |
|---|---|---|---|---|
| 2 | 22 | 2 | 22 | 22 |
| 3 | 3 | 32 | 32 | 32 |
LCM = 22 × 32 = 36
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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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