LCM for 7, 10 and 14
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What's the Least Common Multiple (LCM) of 7, 10 and 14?
Answer
LCM of 7, 10 and 14 is
70
First common multiples: 70, 140, 210, …
70 is divisible by all three: 70 ÷ 7 = 10, 70 ÷ 10 = 7, 70 ÷ 14 = 5 — and 10, 7 and 5 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 10 and of y/10 by 7 and of z/14 by 5.
7 — prime
10 = 2 × 5
14 = 2 × 7
| Prime | 7 | 10 | 14 | Highest power |
|---|---|---|---|---|
| 2 | — | 2 | 2 | 2 |
| 5 | — | 5 | — | 5 |
| 7 | 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 = 2 × 5 × 7 = 70
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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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