LCM for 28 and 54
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What's the Least Common Multiple (LCM) of 28 and 54?
Answer
LCM of 28 and 54 is
756
First common multiples: 756; 1,512; 2,268; …
756 is divisible by both: 756 ÷ 28 = 27, 756 ÷ 54 = 14 — and 27 and 14 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/28 by 27 and of y/54 by 14.
28 = 22 × 7
54 = 2 × 33
| Prime | 28 | 54 | Highest power |
|---|---|---|---|
| 2 | 22 | 2 | 22 |
| 3 | — | 33 | 33 |
| 7 | 7 | — | 7 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 22 × 33 × 7 = 756
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See Also
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Multiples of a Number - List the first 10 multiples of any number from 1 to 999
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