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Calcating the factors of 90 is straightforward. First, every number is divisible by itself and 1.

- Try 1. 1 x 90 = 90, so put these into our factor list.
1 ... 90 - Take 2. 2 x 45 = 90, which means we add these to our factor list.
1 2 ... 45 90 - Now take 3. 3 x 30 = 90, so now we put these in our list of factors.
1 2 3 ... 30 45 90 - Next try 4... no luck. 90/4 isn't a whole number. So we skip 4.
- Now try 5. 5 x 18 = 90, so put these into our factor list.
1 2 3 5 ... 18 30 45 90 - Try 6. 6 x 15 = 90, which means we add these to our factor list.
1 2 3 5 6 ... 15 18 30 45 90 - Take 7... no. 90/7 isn't a whole number. So we skip 7.
- Now take 8... no luck. 90/8 isn't a whole number. So we skip 8.
- Next try 9. 9 x 10 = 90, so put these into our factor list.
1 2 3 5 6 9 ... 10 15 18 30 45 90 - Now, since we don't have any more numbers to try, we're done!
1 2 3 5 6 9 10 15 18 30 45 90

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Need help finding the factors of 90? It's easy! Here you go: the factors of 90 are 1, 2, 3, 5, 6, 9... Randy Tayler | randytayler@gmail.com