LCM for 9 and 7
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What's the Least Common Multiple (LCM) of 9 and 7?
Answer
LCM of 9 and 7 is
63
First common multiples: 63, 126, 189, …
63 is divisible by both: 63 ÷ 9 = 7, 63 ÷ 7 = 9 — and 7 and 9 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/9 by 7 and of y/7 by 9.
9 and 7 are coprime (GCF = 1), so their LCM is simply the product: 9 × 7 = 63.
9 = 32
7 — prime
| Prime | 9 | 7 | Highest power |
|---|---|---|---|
| 3 | 32 | — | 32 |
| 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 = 32 × 7 = 63
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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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