00:01
So how can i find the highest common factor and the least common multiple? well, first i'm going to create the prime factorization tree.
00:08
To start out, i just find what two numbers multiply to these two numbers.
00:12
So 3930, let's start with just 10, 10 and 393.
00:18
Okay, is 10 prime.
00:20
10 is not prime, i can divide it by 5 and 2.
00:23
So then this is 5 times 2.
00:25
What is 393 divisible 5? well, 393 is divisible by 3 and 131.
00:36
Okay, so i have three.
00:38
What about, what are the factors of 131? well, i see that 131 is actually prime.
00:43
It can't be broken down anymore, so 131.
00:46
Okay...