# What are the factors of 90?

and the we repeat

so factors

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See a solution process below:

First, because 90 is an even number we can factor out a 2:

Because 45 ends in a 5 it is divisible by 5 so we can factor out a 5:

We know 9 is divisible by 3 so we can factor our a 3:

or

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When dealing with factors, you can list all the factors, or write a number as the product of the prime factors.

If you know the product of the prime factors you can use those to determine all the other factors.

Listing the factors using these prime factors can be done as follows:

The factors work in pairs, a big one with a small one.

In order they are:

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The factors of 90 are the numbers that can be multiplied together to get 90. These factors include:

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90.

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