LCM for 15 and 5
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What's the Least Common Multiple (LCM) of 15 and 5?
Answer
LCM of 15 and 5 is
15
First common multiples: 15, 30, 45, …
As a common denominator: multiply the top and bottom of y/5 by 3.
5 divides 15 (15 ÷ 5 = 3), so the LCM is the larger number itself.
15 = 3 × 5
5 — prime
| Prime | 15 | 5 | Highest power |
|---|---|---|---|
| 3 | 3 | — | 3 |
| 5 | 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 = 3 × 5 = 15
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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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