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Not normally because the LCM of numbers are found by multiplying their highest prime factors

Q: Can LCM be found by composite numbers?

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You need at least two numbers to find an LCM. It doesn't matter whether they are prime or composite.

When the numbers are relatively prime.

6,364 and 9

LCM of 7 and 13Since 7 and 13 are both prime numbers, or numbers whose only factors are 1 and itself, the LCM can be found by multiplying 7 and 13 together. The answer will be 91.Though multiplying the numbers together when working with composite numbers MIGHT work, it only works 100% of the time when both numbers are prime. If one or both numbers are composite (have more factors than 1 and itself), multiples should be listed until a common one is found. That number will be the LCM.The LCM of 7 and 13 is 91.

When the numbers are relatively prime.

well, look at the factors of 16...we have 2,4,8, and16.So if we had LCM of 8 and 16, that would be 16 an both are composite

They are 4 and 9

Firstly, the LCM f a single number is the number itself.The LCM of many numbers is found by dividing the numbers with the smallest prime numbers until the numbers are completely divided and the remainder is zero.Then all the prime numbers used for dividing is multiplied and the LCM is found.

You need at least two numbers to find an LCM.

I've found all the prime numbers...

If the GCF of two numbers is 1, their LCM will be their product. Such numbers are called relatively prime, or co-prime. Any two prime numbers (like 3 and 5) will be that way, but the numbers don't have to be prime (like 4 and 9).

One possible set of three composite numbers that satisfy the given conditions is 2400, 4800, and 6000. Their greatest common factor is 240, and their least common multiple is 7200. Another possible set of numbers could be 1440, 2880, and 4320, with the same GCF and LCM.