LCM for 7, 12 and 16
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What's the Least Common Multiple (LCM) of 7, 12 and 16?
Answer
LCM of 7, 12 and 16 is
336
First common multiples: 336; 672; 1,008; …
336 is divisible by all three: 336 ÷ 7 = 48, 336 ÷ 12 = 28, 336 ÷ 16 = 21 — and 48, 28 and 21 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/7 by 48 and of y/12 by 28 and of z/16 by 21.
7 — prime
12 = 22 × 3
16 = 24
| Prime | 7 | 12 | 16 | Highest power |
|---|---|---|---|---|
| 2 | — | 22 | 24 | 24 |
| 3 | — | 3 | — | 3 |
| 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 = 24 × 3 × 7 = 336
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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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