To find the factor rainbow of 78, we first determine the factors of 78, which are 1, 2, 3, 6, 13, 26, 39, and 78. We then arrange these factors in a rainbow pattern, starting with 1 and 78 at the ends, and pairing factors that multiply together to equal 78, such as 2 and 39, 3 and 26, and 6 and 13. This visually represents the prime factorization of 78 as 2 x 3 x 13.
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the factor rainbow of 4 is 1,2,4
The greatest common factor of 78 and 546 is 78.
You do a factor rainbow to find a prime factorization. You compare prime factorizations to find a greatest common factor.
The greatest common factor of 12 and 78 is 6.
78 39,2 13,3,2