posted by Steve on .
what is the GCF and the LCM fo 10-75-55 could you please explain to me how to do this. Thank you
10 = 2*5
75 = 3*5*5
55 = 5*11
The GCF is the largest number that divides into all three numbers,
in this case 5
the GCF ≤ the smallest of the numbers
The LCM is that number which contains all the factors that are found in all the numbers
in this case it is 2*3*5*5*11 = 1650
It is the smallest number that the given numbers divide INTO evenly
the LCD ≥ the largest of the given numbers.
for the LCD I usually write down the longest string of factors, then looking at the other group of factors, I include any others not yet included in my string.