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The common factors of 12 and 21 are 1 and 3.

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โˆ™ 2010-05-15 06:08:07
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Q: What is one number that is a factor of 12 and 21?
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Related questions

What is a prime number for 12 and 21?

3 is a prime factor of 12 and of 21.


What prime number is a factor of 12 and 21?

3


What number is a prime factor of both 12 and 21?

3


What is the greatest factor of 21 and 12?

-- The greatest factor of 21 is 21 .-- The greatest factor of 12 is 12 .-- 1, 2, and 3 are factors of both 21 and 12 .-- The greatest common ('same for both') factor is 3 .


What is the greatest common factor of 12 and 21?

If you want the "greatest", then there can only be one of it.You can't have two different numbers and say that they'reboth the "greatest".The greatest common factor of 12 and 21 is 3 .


Twenty-one is 12 percent of what number?

21 = (.12)(x) 21 / .12 = x Answer: 175


What is the scale factor if 21 and 12?

It is: 21/12 = 7/4


Common factor of 12 and 21?

CF of 12 and 21 is 3.


What is a number called when it has one factor?

Like 21? Prime numbers.


What is the greatest common factor of 12 and 36 and 21?

The Greatest Common Factor of 12, 36, 21 is 3.


What is th greatest common factor of 12 and 21?

The highest common factor of the numbers 12 and 21 is 3.


What is a factor number of 21?

The factors of 21: 1, 3, 7, 21


What number is it has 90 as a factor thre number is prime 21 is the multiple of the number?

If 21 is a multiple of the number, the number cannot have 90 as a factor.


Is the number 21 composite square or prime?

21 is a composite number because it has at least one positive factor other than one or itself.


What are two factors of a number if 21 is one of the factors?

If 21 is a factor of a number, then the factors of 21 must also be factors. So 3 and 7


What is the composite number for 21?

The only composite factor of 21 is 21.


What are the first three common factors of 16 and 21?

16 and 21 only have one common factor, the number one.


Why is 21 the greatest common factor in 21 and 63?

Because 21 is a factor of 63. 21 is the greatest factor of 21. A larger number doesn't exist.


What is the prime factor of 21 and 12?

For 21, 3 and 7. For 12, 2 and 3.


What is a prime factor of 12 and 21?

3


What is the least common multiple of 12 and 21?

The LCM of 12 and 21 is 84. To find the LCM, prime factor both numbers then multiply each factor the most times it was used in either number.12=2x2x321=3x7lcm=2x2x3x7=84The Least Common Multiple (LCM) for 12 21 is 84.


What are the release dates for The O'Reilly Factor - 1996 2012-12-21?

The O'Reilly Factor - 1996 2012-12-21 was released on: USA: 21 December 2012


You are a factor between 11 and 21?

You are 12-20. The only common factor of 11 and 21 is 1.


What is the greatest common factor of 12 21 and 88?

The GCF of 12, 21, and 88 is 1.


Is 21 a factor of 24?

No 21 is not a factor of 24. In order for a number to be a factor of another number, x number times n number must equal the number you are trying to factor. Below is a self made image that explains factoring and shows you how to factor 24.