1,2,3,4,5

And you want to find the least common multiple of them all. First convert each to a prime factorization.

1 = 1

2 = 1*2

3 = 1*3

4 = 2*2

5 = 1*5

Now, just take each prime factor the most times it appears in any entry, and use it that many times, and multiply them all together.

LCM = 1*2*2*3*5 = 60

Anyhow, I googled it, and found that this is the standard way it's supposed to be taught. I'm positive that I dodged this bit of information in my fairly extensive math background, and I'm not sure how.

At least now I'm sure that I agree with it.

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