LCM for 18, 27 and 45
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What's the Least Common Multiple (LCM) of 18, 27 and 45?
Answer
LCM of 18, 27 and 45 is
270
First common multiples: 270, 540, 810, …
270 is divisible by all three: 270 ÷ 18 = 15, 270 ÷ 27 = 10, 270 ÷ 45 = 6 — and 15, 10 and 6 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/18 by 15 and of y/27 by 10 and of z/45 by 6.
18 = 2 × 32
27 = 33
45 = 32 × 5
| Prime | 18 | 27 | 45 | Highest power |
|---|---|---|---|---|
| 2 | 2 | — | — | 2 |
| 3 | 32 | 33 | 32 | 33 |
| 5 | — | — | 5 | 5 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 2 × 33 × 5 = 270
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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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LCM Table
| 1st | 2nd | 3rd | LCM |
|---|---|---|---|
| 18 | 27 | 30 | 270 |
| 18 | 27 | 31 | 1,674 |
| 18 | 27 | 32 | 864 |
| 18 | 27 | 33 | 594 |
| 18 | 27 | 34 | 918 |
| 18 | 27 | 35 | 1,890 |
| 18 | 27 | 36 | 108 |
| 18 | 27 | 37 | 1,998 |
| 18 | 27 | 38 | 1,026 |
| 18 | 27 | 39 | 702 |
| 18 | 27 | 40 | 1,080 |
| 18 | 27 | 41 | 2,214 |
| 18 | 27 | 42 | 378 |
| 18 | 27 | 43 | 2,322 |
| 18 | 27 | 44 | 1,188 |
| 18 | 27 | 45 | 270 |
| 18 | 27 | 46 | 1,242 |
| 18 | 27 | 47 | 2,538 |
| 18 | 27 | 48 | 432 |
| 18 | 27 | 49 | 2,646 |
| 18 | 27 | 50 | 1,350 |
| 18 | 27 | 51 | 918 |
| 18 | 27 | 52 | 1,404 |
| 18 | 27 | 53 | 2,862 |
| 18 | 27 | 54 | 54 |
| 18 | 27 | 55 | 2,970 |
| 18 | 27 | 56 | 1,512 |
| 18 | 27 | 57 | 1,026 |
| 18 | 27 | 58 | 1,566 |
| 18 | 27 | 59 | 3,186 |