7
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Common factors of 28 and 42 are: 1, 2, 7, and 14.
1 is the least common factor of the number 2, number 4 and number 7. 28 is the least common multiple of the number 2, number 4 and 7.
GCF requires a COMMON factor. You cannot have a COMMON factor with only one number - you require at least TWO numbers.To have a greatest COMMON factor of 7, the numbers must have only 7 as a common prime factor.Thus, for example 7, 12474, 3183837475 & 20106594977 have a Greatest COMMON factor of 7.
No, they have the common factor 7.No, they have the common factor 7.No, they have the common factor 7.No, they have the common factor 7.
Express each number in terms of its prime factors. 77 = 7 x 11 259 = 7 x 37 The only common factor and therefore the highest common factor is 7.