# Quick Answer: What Are The Common Factors Of 28 And 21?

## What are two factors of 28?

The factors of 28 are the numbers, which on multiplication in pairs results in the original number.

These factors are 1,2,4,7,14 and 28.

Since, 2 x 14 = 28, therefore (2,14) is a pair factor of number 28..

## What is the perfect square of 28?

784Perfect Square:Positive IntegerInteger Squared=Perfect Squares List2727 ^2 =7292828 ^2 =7842929 ^2 =8413030 ^2 =90092 more rows

## What factors do 20 and 30 have in common?

The numbers 20 and 30 have the factors 2 and 5 in common. Next, multiply the common factors to find the GCF. If there is only one common factor, there is no need to multiply. The GCF of 20 and 30 is 10.

## What is the GCF of 18 and 27?

Example: Find the GCF of 18 and 27 The factors of 18 are 1, 2, 3, 6, 9, 18. The factors of 27 are 1, 3, 9, 27. The common factors of 18 and 27 are 1, 3 and 9. The greatest common factor of 18 and 27 is 9.

## What are the common factors of 28?

28 = 1 x 28, 2 x 14, or 4 x 7. Factors of 28: 1, 2, 4, 7, 14, 28.

## What is the greatest common multiple of 28 and 21?

The GCF of 21 and 28 is 7.

## What is the GCF of 24 and 28?

We found the factors and prime factorization of 24 and 28. The biggest common factor number is the GCF number. So the greatest common factor 24 and 28 is 4.

## What are the common factors of 25?

The factors of 25 are 1, 5, and 25. The common factors of 20 and 25 are 1 and 5. Example: What are the common factors of 15 and 30?

## What are the common factors of 30 9 and 24?

Factors for 9: 1, 3, and 9. Factors for 24: 1, 2, 3, 4, 6, 8, 12, and 24. Factors for 30: 1, 2, 3, 5, 6, 10, 15, and 30….It’s also commonly known as:Greatest Common Denominator (GCD)Highest Common Factor (HCF)Greatest Common Divisor (GCD)

## What is the GCF of 7/15 and 21?

The common factors for 7,15,21 7 , 15 , 21 are 1 . The GCF (HCF) of the numerical factors 1 is 1 .

## What are the common factors for 21?

21 is a composite number. 21 = 1 x 21 or 3 x 7. Factors of 21: 1, 3, 7, 21.

## What are the common factors of 28 and 20?

Factors for 20: 1, 2, 4, 5, 10, and 20. Factors for 28: 1, 2, 4, 7, 14, and 28….It’s also commonly known as:Greatest Common Denominator (GCD)Highest Common Factor (HCF)Greatest Common Divisor (GCD)

## What are the common factors of 18 and 21?

1, 2, 3, 6, 9, 18. Factors of 21: 1, 3, 7. The highest number that both sets contain is 3, so the GCF will be 3.

## What is the GCF of 6 and 10?

Greatest common factor (GCF) of 6 and 10 is 2. We will now calculate the prime factors of 6 and 10, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 6 and 10.

## What are the common factors of 24 and 30?

For most school problems or uses, you can look at the factors of the numbers and find the greatest common factor that way. For 24 and 30 those factors look like this: Factors for 24: 1, 2, 3, 4, 6, 8, 12, and 24. Factors for 30: 1, 2, 3, 5, 6, 10, 15, and 30.

## What is the GCF of 18 and 36?

We found the factors and prime factorization of 18 and 36. The biggest common factor number is the GCF number. So the greatest common factor 18 and 36 is 18.

## What are the factors of 28 and 21?

For 21 and 28 those factors look like this:Factors for 21: 1, 3, 7, and 21.Factors for 28: 1, 2, 4, 7, 14, and 28.

## What is the highest common factor of 28?

The Greatest Common Factor (GCF) for 28 and 32, notation CGF(28,32), is 4. Explanation: The factors of 28 are 1,2,4,7,14,28; The factors of 32 are 1,2,4,8,16,32.