What is the factor rainbow for 9?

Answer 1

List the number at the bottom. Break it down into factors by placing them on successive lines above the original number. Stop when all the factors are prime.

7,5,3,2

35,3,2

105,2

210

Answer 2

Factor rainbows, like trees, fireworks and ladders, are ways to notate the process of finding the prime factorization of a given number. This is achieved by dividing prime numbers into the given number until all the factors are prime. With a factor rainbow, the given number is written at the bottom. Example: 210

7,5,3,2

35,3,2

105,2

210

2 x 3 x 5 x 7 is the prime factorization of 210.

Answer 3

A factor rainbow is just an upside down factor tree. With factor trees, you put the number at the top and factor down. With factor rainbows, you put the number at the bottom and factor up.

7,5,3,2

35,3,2

105,2

210

Answer 4

A factor rainbow, like factor trees, ladders and fireworks, is a way to notate the process of finding the prime factorization of a given number.

Answer 5

Factor rainbows, like trees, ladders and fireworks, are a way to notate the process of finding the prime factorization of a given composite number.

Answer 6

A factor rainbow for 7 would have only one arc, with the numbers 1 and 7.

Answer 7

3,3

9