WHAT ARE THE LCM OF 16 AND 20
The greatest common factor is 4.
Multiply 16 * 20.
Divide that answer by 4.
This site shows that method plus another similar method.
http://www.aaamath.com/fra66i-lcm.html
...16 20
-----
4 | 4 5
4 | 1 5
5 | 1 1
so LCM = 4x4x5 = 80
To find the LCM (Least Common Multiple) of two numbers, such as 16 and 20, you can follow a simple step-by-step process:
Step 1: List the prime factors of each number.
- Prime factors of 16: 2 * 2 * 2 * 2
- Prime factors of 20: 2 * 2 * 5
Step 2: Identify the highest power of each prime factor.
- The highest power of 2 is 2 * 2 * 2 * 2 = 16.
- The highest power of 5 is 5.
Step 3: Multiply the highest powers of the prime factors together.
- Multiply the highest powers: 16 * 5 = 80.
Therefore, the LCM of 16 and 20 is 80.