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# What is the GCF of 42 and 35 and 21?

## What is the GCF of 42 and 35 and 21?

As you can see when you list out the factors of each number, 7 is the greatest number that 21, 35, and 42 divides into.

What is the GCF of 21 35 and 49?

The biggest common factor number is the GCF number. So the Greatest Common Factor 21, 35, 49 is 7.

### What is the GCF of 21 28 and 35?

Greatest common factor (GCF) of 21, 28, 35 is 7.

What’s the GCF of 35 and 42?

7
The GCF of 35 and 42 is 7. To calculate the greatest common factor (GCF) of 35 and 42, we need to factor each number (factors of 35 = 1, 5, 7, 35; factors of 42 = 1, 2, 3, 6, 7, 14, 21, 42) and choose the greatest factor that exactly divides both 35 and 42, i.e., 7.

## How do you calculate GCD?

The steps to calculate the GCD of (a, b) using the LCM method is:

1. Step 1: Find the product of a and b.
2. Step 2: Find the least common multiple (LCM) of a and b.
3. Step 3: Divide the values obtained in Step 1 and Step 2.
4. Step 4: The obtained value after division is the greatest common divisor of (a, b).

What is the GCF of 21 35?

GCF of 21 and 35 by Listing Common Factors Therefore, the greatest common factor of 21 and 35 is 7.

### What is the factor of 21 and 35?

Greatest common factor (GCF) of 21 and 35 is 7.

What is the GCF of 35 28 and 42?

Greatest Common Factor We found the factors of 28, 42, 35 . The biggest common factor number is the GCF number. So the Greatest Common Factor 28, 42, 35 is 7.

## What is the GCF 21 35?

Answer: GCF of 21 and 35 is 7.

What is the GCF of 42?

Answer: Factors of 42 are 1, 2, 3, 6, 7, 14, 21, 42. There are 8 integers that are factors of 42. The greatest factor of 42 is 42.

### What is the GCF of 21 and 35?

What is the GCF of 20 24 and 40?

The common factors for 20,24,40 20 , 24 , 40 are 1,2,4 1 , 2 , 4 .

## How do you solve GCD problems?

Finding Greatest Common Divisor by LCM Method

1. Step 1: Find the product of a and b.
2. Step 2: Find the least common multiple (LCM) of a and b.
3. Step 3: Divide the values obtained in Step 1 and Step 2.
4. Step 4: The obtained value after division is the greatest common divisor of (a, b).

What does GCF mean in math?

greatest common factor
The greatest common factor (GCF) of a set of numbers is the largest factor that all the numbers share. For example, 12, 20, and 24 have two common factors: 2 and 4. The largest is 4, so we say that the GCF of 12, 20, and 24 is 4. GCF is often used to find common denominators.

### What is the LCM of 42 and 35?

210
The LCM of 35 and 42 is 210.

What are the GCF of 35?

Factors of 35 = 1, 5, 7, 35.

## What number is the GCF of 21 and 35?

Greatest common factor (GCF) of 21 and 35 is 7. We will now calculate the prime factors of 21 and 35, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21 and 35.

What is the greatest common factor of 42 and 21?

As visible, 21 and 42 have common prime factors. Hence, the GCF of 21 and 42 is 3 × 7 = 21.

### What is the greatest common factor of 42 21 and 28?

We found the factors and prime factorization of 28 and 42. The biggest common factor number is the GCF number. So the greatest common factor 28 and 42 is 14….Prime Factorization of 42.

2 42
3 21
7 7
1