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* One method is to factor each number into prime factors, and see what factors they have in common.
210 = 2x105 = 2x5x21 = 2x5x3x7, or 2x3x5x7.
308 = 2x154 = 2x2x77 = 2x2x7x11.
The GCF is 2x7 = 14.
* Another method (more efficient, especially for larger numbers) is Euclid's algorithm. In this case for example, the greatest common factor of 308 and 210 is the same as the greatest common factor of 210 and 98. This latter number is the remainder of the division of 308 by 210. Continue until one of the numbers is zero. In that case, the other one is the greatest common factor.
308/210 = 1, remainder 98
210/98 = 2, remainder 14
98/14 = 7, remainder 0.
The previous remainder (14) is the GCF.
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What is the greatest common factor of 140 168 and 210?
The GCF of 140, 168 and 210 is 14.
Does 42 and 168 and 210 have a common factor of 6?
No. 42 is a factor of both 168 and 210. The GCF is 42.
What is the highest common factor of 294 252 and 210?
The highest common factor of the numbers 294, 252 and 210 is 42.
What are the factors and prime factors of 210?
210 is a composite number because it has factors other than 1 and itself. It is not a prime number.The 16 factors of 210 are 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, and 210.The factor pairs of 210 are 1 x 210, 2 x 105, 3 x 70, 5 x 42, 6 x 35, 7 x 30, 10 x 21, and 14 x 15.The proper factors of 210 are 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 41, 70, and 105 or,if the definition you are using excludes 1, they are 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 41, 70, and 105.The prime factors of 210 are 2, 3, 5, and 7.The distinct prime factors (listing each prime factor only once) of 210 are also 2, 3, 5, and 7.The prime factorization of 210 is 2 x 3 x 5 x 7.NOTE: There cannot be common factors, a greatest common factor, or a least common multiple because "common" refers to factors or multiples that two or more numbers have in common. 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105 and 210.
What are the factor pairs of 210?
The factor pairs of 210 are: 1 and 210 2 and 105 3 and 70 5 and 42 6 and 35 7 and 30 10 and 21 14 and 15
