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Example: 30 and 42

Factor them.

2 x 3 x 5 = 30

2 x 3 x 7 = 42

Select the common factors.

2 x 3 = 6, the GCF

or

The factors of 30 are:

1, 2, 3, 5, 6, 10, 15, 30

The factors of 42 are:

1, 2, 3, 6, 7, 14, 21, 42

The common factors are:

1, 2, 3, 6

The Greatest Common Factor:

GCF = 6

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Related questions

Who is the Greek mathematician who invented an easier way of finding the GCF?

Euclid is the Greek mathematician who invented an easier way of finding the GCF.


How does finding the gcf help you solve real world problems?

Finding the LCM will help you add and subtract fractions. Finding the GCF will help you reduce fractions.


When do you use GCF and LCM?

Gcf you use when you are finding the greatest factor for the numbers. Lcm you use when you are finding the smallest multiple in the numbers factors


Why is the GCF important?

Finding the GCF will help you to simplify fractions.


What is the purpose of first finding the GCF?

The answer depends on what you are trying to achieve. there is not much point in first finding the GCF if all that you want to do is to cook some scrambled eggs!


What are the three steps in finding the GCF of two numbers?

Example: 30 and 42 Factor them. 2 x 3 x 5 = 30 2 x 3 x 7 = 42 Select the common factors. 2 x 3 = 6, the GCF


Is there a shortcut to finding gcf of large numbers?

Yes there is


What steps can be followed for finding a misplaced paper medical record?

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How can fractions be simplified by finding the GCF and using divisibility rules?

Simplifying fractions and finding the GCF is easy. All you have to do is put the fraction into simplest form and then put in a whole number.


What helps you simplify fractions?

Finding the GCF of the numerator and denominator.


Method in finding the GCF?

listing method , factor tree


How Have You Used GCF When Working With Fractions?

Finding the GCF of the numerator and denominator and dividing them both by it will give you the simplest form of the fraction.