00:01
All right, so we're going to find the greatest common factor between 240 and 150.
00:13
And we're going to do that using prime factorization.
00:16
So first i've got to find my prime factorization.
00:19
So 240 will divide by 2 to give me 120.
00:25
120 will divide by 2 to give me 60.
00:33
60 will divide by 2 to give me 30.
00:40
30 will divide by 2 to give me 15 and then i know that 15 is going to be 3 times 5 and that's going to give me 1.
01:04
So i know that that one is now, i've got my prime factorization for that one.
01:08
Now for that other number, 150, again, i'm going to divide by 2 to get 75.
01:17
75 will divide by 3 to get 25 and then i know 25 is 5 times 5.
01:24
So dividing that by five twice gives me my one on the bottom...