Question 45681: Can someone help me on this?
I need to find the LCM (least common multiple) for each of the following group of numbers:
8, 15, and 20
Thanks,
Sher
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! LCM of 8,15, and 20
Method for finding LCM.
1. convert each number to its prime-factor form, as follows:
8=2*2*2
15=3*5
20=2*2*5
2. The LCM must contain each prime factor to the highest
power indicated, as follows:
2 must be there are 2^3
3 must be there as 3
5 must be there as 5
3. Find the product of these, as follows:
2^3*3*5 = 8*15= 120
That is the LCM of 8, 15, and 20
Cheers,
Stan H.
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