28:8 = 7:2 (divide by four cause four is their greatest common factor)
196 = 2 x 2 x 7 x 7; 420 = 2 x 2 x 3 x 5 x 7. Common factors 2 x 2 x 7 ie 28 is the HCF.
To find the greatest common factor (GCF), first find the prime factorization of the two numbers. The GCF is the product of all of the prime factors the two numbers have in common. Prime factors of 28: 2, 2, 7 Prime factors of 68: 2, 2, 17 They have in common: 2, 2. 2x2=4 The GCF is 4.
The factors of 28 are:1, 2, 4, 7, 14, 28The factors of 42 are:1, 2, 3, 6, 7, 14, 21, 42The factors of 70 are:1, 2, 5, 7, 10, 14, 35, 70The common factors are:1, 2, 7, 14The Greatest Common Factor (GCF) is: 14
7(x - 2)(x + 2)
2, 7
The greatest common factor of 7 and 28 is 7.
Greatest common factor= 7 The greatest common factor is the factor that all these numbers have in common. It helps to make a list of all the number's factors. 28- 2, 2, 7 35- 5, 7 42- 2, 3, 7 All of these numbers have 7 as a factor, therfore 7 is the greatest common factor
Since 7 is a factor of 28, it is automatically the GCF of 7 and 28The Greatest Common Factor (GCF) of 28 and 7 is 7.
The common factors of 28 & 42 are : 2 , 7 , 14The largest common factor is 14
28 = 2 x 2 x 7 63 = 3 x 3 x 7 91 = 7 x 13 7 is the only common factor so is the highest common factor
The factors of 14 are 1, 2, 7, and 14. The factors of 28 are 1, 2, 4, 7, 14, and 28. The common factors of 14 and 28 are 1, 2, 7, and 14. Therefore, the least (smallest) common factor is 1.
2 and 7
Since 7 is a factor of 28, it is automatically the GCF.
The greatest common factor of 28 and 77 is 7.One way to determine the greatest common factor is to find all the factors of the numbers and compare them.The factors of 28 are 1, 2, 4, 7, 14, and 28.The factors of 77 are 1, 7, 11, and 77.The common factors are 1 and 7. Therefore, the greatest common factor is 7.The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.The prime factors of 28 are 2, 2, and 7.The prime factors of 77 are 7 and 11.The prime factors in common are a single 7, so the greatest common factor is 7.Summary of results:The common factors are 1 and 7.The greatest common factor is 7.
14 One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 28 are 1, 2, 4, 7, 14, and 28. The factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70. The common factors are 1, 2, 7, and 14. Therefore, the greatest common factor is 14. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 28 are 2, 2, and 7. The prime factors of 70 are 2, 5, and 7. The prime factors in common are 2 and 7, so the greatest common factor is 2 x 7 = 14.
The greatest common factor of 28 and 49 is 7.