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Since 84 is a factor of 420, it is automatically the GCF.

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You need at least two numbers to find a GCF.

Common factors of 735 and 1050 are: 1, 3, 5, 7, 15, 21, 35, and 105.

"Common" means "same for both". There's nothing common about a single

thing, and there's no such thing as a common factor of only one number.

The common factors are: 3, 5 and 7

84 are.

105

Q: What is the common factors of 420 735 945?

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Common factors of 420, 735, and 945 are: 1, 3, 5, 7, 15, 21, 35, and 105.

The GCF is 105.

Obtain the prime factors of both numbers. 450 = 2 x 3 x 3 x 5 x 5 735 = 3 x 5 x 7 x 7 The factors common to both numbers are 3 and 5. The GCF is 3 x 5 = 15

105, 210, 315, 420, 525, 630, 735, 840, 945 +105 . . .

Here are some multiples of both 15 and 7: 105, 210, 315, 420, 525, 630, 735, 840, 945.

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Common factors of 420, 735, and 945 are: 1, 3, 5, 7, 15, 21, 35, and 105.

The GCF of 420, 735, and 945 is 105.The prime factorization of 420 is 2x2x3x5x7The prime factorization of 735 is 3x5x7x7The prime factorization of 945 is 3x3x3x5x7(1) List the prime factors of each number.(2) Multiply those factors all numbers in the set have in common. If there are no common prime factors, the GCF is 1. (Those factors are the ones in bold type.)As you can see the GCF is 3x5x7 or 105

The GCF is 105.

The factors of 735 are: 1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735.The factors of 945 are: 1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945.The common factors are: 1, 3, 5, 7, 15, 21, 35, 105.The Greatest Common Factor: 105

105, 210, 315, 420, 525, 630, 735, 840, 945 . . .

105

The GCF is 105.

They are: 105, 210, 315, 420, 525, 630, 735, 840, 945, 1050, 1155, 1260, 1365, 1470, 1575.

The multiples of 105 (which are infinite) are all divisible by 105, including these: 105, 210, 315, 420, 525, 630, 735, 840, 945 . . .

Obtain the prime factors of both numbers. 450 = 2 x 3 x 3 x 5 x 5 735 = 3 x 5 x 7 x 7 The factors common to both numbers are 3 and 5. The GCF is 3 x 5 = 15

The multiples of 105 are divisible by 105, namely:105, 210, 315, 420, 525, 630, 735, 840, 945, 1050, ...105 is divisible by its factors: 1, 3, 5, 7, 15, 35, 105

1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735 1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945 3, 5 and 7 are prime.