GCM OF 12 and 20. Please explain

4 is the GCM

because 3x4=12 and 5x4=20

the gcm or greatest common multiple is the largest number that both the factors(in this case 12 and 20) have in common

Google gcm in math and click the fourth one, it may help SHOW you how to do it. It doesn't explain it, but it is a good way to check your answers

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To find the Greatest Common Measure (GCM) of two numbers, such as 12 and 20, we can use the method of prime factorization.

Step 1: Prime factorize both numbers.
To do this, we break down the numbers into their prime factors.

12 can be written as 2^2 * 3^1.
20 can be written as 2^2 * 5^1.

Step 2: Identify the common factors.
We look for the factors that are common to both numbers. In this case, the common factor is 2^2, which means both 12 and 20 have two factors of 2.

Step 3: Calculate the GCM.
To calculate the GCM, we multiply the common factors identified in the previous step. In this case, it is 2^2, which equals 4.

Therefore, the Greatest Common Measure (GCM) of 12 and 20 is 4.