Q: Why do your multiply two numbers together when their only common factor is 1?

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The greatest common factor (GCF) of two (or more) numbers is the greatest factor that divides two numbers. To find the GCF you must work out and list the prime factors of each of the numbers. You will see that the numbers have prime factors in common. Multiply those factors the numbers have in common together and this gives you the GCF for the numbers. eg Number A = 18, Prime factors = 2*3*3 Number B = 24, Prime factors = 2*2*2*3 The Prime factors that A and B have in common are 2 and 3 Multiply them together = 6 6= the GCF of 18 and 24

If you have two numbers, multiply them together and divide that total by the GCF. The result will be the LCM.

The only common factor between them is 1, so just multiply the numbers together: 77 x 20 = 1540

Prime factor each number. Collect the factors that are common. Multiply the numbers together and get it. 90=2x5x3x3 27=3x3x3 3x3=9

To find the highest common factor of two numbers you first need to break them down into their prime factors. In this case: 24 = 2x2x2x3 28 = 2x2x7 The next step is to identify the common factors. In this case, both numbers have two 2s as a factor. We multiply these together to get the HCF: 2x2=4 Thus 4 is the highest common factor of 24 and 28.

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To get the greatest common factor you must multiply the two numbers together, in this case giving you 156.

Factors are the numbers you multiply together to get another number

factor out both numbers until only prime numbers are left. 133=7*19 259=37*7 you would multiply together all the common factors, which in this case is just 7, to get the greatest common factor of 7

If there's only one prime common to the numbers, that's the GCF. If there's more than one, multiply them together. That's the GCF.

The greatest common factor (GCF) of two (or more) numbers is the greatest factor that divides two numbers. To find the GCF you must work out and list the prime factors of each of the numbers. You will see that the numbers have prime factors in common. Multiply those factors the numbers have in common together and this gives you the GCF for the numbers. eg Number A = 18, Prime factors = 2*3*3 Number B = 24, Prime factors = 2*2*2*3 The Prime factors that A and B have in common are 2 and 3 Multiply them together = 6 6= the GCF of 18 and 24

If you have two numbers, multiply them together and divide that total by the GCF. The result will be the LCM.

A factor tree of number is (I think) the numbers that multiply together to form a product. They are prime numbers, too.

Factor Noun- the numbers that are multiplied together to get a product. Verb- to find the numbers that multiply together to get the product.

Factor both of the numbers. 122=61X2 133=19X7 Since there are no common factors, you will have to multiply the two numbers together to get the LCM. 122X133=16,226 Answer: 16,226

The only common factor between them is 1, so just multiply the numbers together: 77 x 20 = 1540

Prime factor each number. Collect the factors that are common. Multiply the numbers together and get it. 90=2x5x3x3 27=3x3x3 3x3=9

To find the greatest common factor of two numbers, you first need to break those numbers down into their prime factors. For 105 and 147 this is: 105 = 3x5x7 147 = 3x7x7 The next step is to identify any common prime factors. In this case, both numbers have a 3 as a prime factor, and a 7 as a prime factor. Multiply these together to get the GCF: 3x7 = 21 Thus the greatest common factor of 105 and 147 is 21.