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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

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Q: How do you use the rainbow method to list factors?
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Related questions

What strategy do you use to complete a list of factors?

you use a factor tree


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What does product of their prime factors mean?

Expressing a number as a "product of its prime factors" is also known as the prime factorization. To find the prime factorization, keep dividing a number by prime numbers until all the factors are prime. You can also use a factor tree or rainbow or fireworks or whichever method works best for you. Example: 330 330 165,2 55,3,2 11,5,3,2 2 x 3 x 5 x 11 = 330, expressed as a product of its prime factors.


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When finding LCM do you have to keep going up using big numbers?

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Write a java program to sort a list of numbers?

The simplest would be to put the numbers into an int[] (integer array) and pass that to java.util.Arrays.sort(int[]) (a static method), which will sort the array in ascending numerical order. Use a float[] or double[] if you need to sort non-whole numbers. You can also use the Collections.sort(List) method to sort the List directly. Or the Collections.sort(List, Comparator) if you wish to specify your own sorting criteria.