LCM for 12 and 55

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What's the Least Common Multiple (LCM) of 12 and 55?

Answer

LCM of 12 and 55 is
660

First common multiples: 660; 1,320; 1,980; …

660 is divisible by both: 660 ÷ 12 = 55, 660 ÷ 55 = 12 — and 55 and 12 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/12 by 55 and of y/55 by 12.

12 and 55 are coprime (GCF = 1), so their LCM is simply the product: 12 × 55 = 660.

12 = 22 × 3

55 = 5 × 11

Prime1255Highest power
222—22
33—3
5—55
11—1111

— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.

LCM = 22 × 3 × 5 × 11 = 660

See Also

FAQ

What's the Least Common Multiple (LCM) of 12 and 55?

LCM of 12 and 55 is 660

How to find the LCM of 12 and 55 using prime factorization?

To find the LCM of 12 and 55, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 660.

What is the difference between LCM and GCF?

LCM (Least Common Multiple) is the smallest number divisible by both numbers, while GCF (Greatest Common Factor) is the largest number that divides both. For 12 and 55: LCM = 660, GCF = 1.