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Factor them. Example: 30 and 42

2 x 3 x 5 = 30

2 x 3 x 7 = 42

Find the common factors.

2 x 3 = 6, the GCF

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Q: How do you find gcf of each pair of numbers?
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How do you find a pair of numbers when the GCF is given?

To find a pair of numbers with a given GCF, take the GCF number and double it. The pair of numbers is the GCF, and two times the GCF. For instance, two numbers with a GCF of 3 are 3 and 6.


Find the GCF of each pair of numbers 86 36?

2


How do you find two numbers if HCF and LCM are known?

The product of the GCF and the LCM of two numbers is equal to the product of the original two numbers. Multiply the GCF and the LCM. The original two numbers will be another factor pair of that total. Find the factor pair that has that GCF and LCM.


Will a pair of numbers each greater than 100 always have a greater gcf than a pair of numbers that are both less than 100?

Not at all. For example: gcf(101, 102) = 1 gcf(40, 80) = 40


Find a pair of numbers is the LCM is 36 and the GCF is 1?

4 and 9


What pair of numbers is GCF of 12 and 16?

The GCF is a single number so there cannot be any pair of numbers in the answer.


Find a pair of numbers whose LCM is 120 and GCF is 10?

10 and 120


Does a pair of numbers each greater than 100 always have a greater greatest common denominator than a pair of numbers that are both less than 100?

No. Although the greatest common denominator of a pair of numbers is infinite, the size of the numbers doesn't affect the GCF as much as the difference between them. The GCF of 100 and 102 is 2. The GCf of 33 and 66 is 33.


What is the GCF of each pair of numbers?

The greatest common factor, or GCF, is the largest positive integer that will divide evenly with no remainder into all the members of a given set of numbers. The GCF of 6 and 9 is 3.


Find a pair of numbers for LCM equals 36 and GCF equals 3?

9 and 12


What is a pair of numbers to the gcf number 2?

Any consecutive even numbers have a GCF of 2.


What is the product of the GCF and LCM of two numbers?

The product of the GCF and LCM of a pair of numbers is equal to the product of the numbers.