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The GCF of 21 and 30 is 3
Definition: A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that the numbers have in common.
Method:
One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.
The factors of 21 are 1, 3, 7, and 21.
The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30.
The common factors are 1 and 3. Therefore, the greatest common factor is 3.
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What is the greatest common factor of 21 30 and 40?
The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers. The greatest common factor of 21, 30, and 40 is 1
What is the greatest common factor of 21 30 and 44?
21 = 3 x 7 30 = 2 x 3 x 5 44 = 2 x 2 x 11 GCF = 1
What is the greatest common factor of 20 and 30?
The greatest common factor (GCF) of 20 and 30 is 10.
What is the greatest common factor of 30 and 150?
30 is a factor of 150 so 30 is the greatest common factor of 30 and 150
What is the greatest common factor of 7 and 30?
The greatest common factor of 7 and 30 is 1.
What is the greatest common factor of 21and 30 and 44?
The Greatest Common Factor of 21, 30, 44: 1
What is the greatest common factor 21 30?
The GCF is 3.
What is the GCF of 30 and 21?
3 is the greatest common factor
What is the greatest common factor of 21 30 and 72?
The GCF of 21, 30, and 72 is 3.
What is the greatest common factor 21 and 30 and 44?
The Greatest Common Factor of 44, 42, 3: 1
What is the greatest common factor 12 21 and 30?
The GCF is 3.
What is the greatest common factor for 12 21 and 30?
The GCF is 3.
What is the greatest common factor for 15 21 and 30?
The GCF is 3.
What is the greatest common factor of 21 24 and 30?
The GCF is: 3
What is the greatest common factor of 15 21 and 30?
The GCF is 3.
What is the greatest common factor for 12 21 30?
The prime factors are: 12 = 2 * 2 *3 21 = 3 *7 30 = 2 * 3 * 5 So the greatest common factor is 3.
What is the greatest common factor of 21 30 and 40?
The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers. The greatest common factor of 21, 30, and 40 is 1
