LCM for 45 and 70
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What's the Least Common Multiple (LCM) of 45 and 70?
Answer
LCM of 45 and 70 is
630
First common multiples: 630; 1,260; 1,890; …
630 is divisible by both: 630 ÷ 45 = 14, 630 ÷ 70 = 9 — and 14 and 9 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/45 by 14 and of y/70 by 9.
45 = 32 × 5
70 = 2 × 5 × 7
| Prime | 45 | 70 | Highest power |
|---|---|---|---|
| 2 | — | 2 | 2 |
| 3 | 32 | — | 32 |
| 5 | 5 | 5 | 5 |
| 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 × 32 × 5 × 7 = 630
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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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