LCM for 55 and 77
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What's the Least Common Multiple (LCM) of 55 and 77?
Answer
LCM of 55 and 77 is
385
First common multiples: 385; 770; 1,155; …
385 is divisible by both: 385 ÷ 55 = 7, 385 ÷ 77 = 5 — and 7 and 5 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/55 by 7 and of y/77 by 5.
55 = 5 × 11
77 = 7 × 11
| Prime | 55 | 77 | Highest power |
|---|---|---|---|
| 5 | 5 | — | 5 |
| 7 | — | 7 | 7 |
| 11 | 11 | 11 | 11 |
— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.
LCM = 5 × 7 × 11 = 385
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- 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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