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September 1, 2014

September 1, 2014

Posted by **Alex L.** on Wednesday, October 5, 2011 at 6:18pm.

eighteen, four hundred eighty, six hundred forty

Next, I need to write this fraction in lowest terms.

one-hundred sixty-five over one-hundred eighty

- Math -
**Steve**, Wednesday, October 5, 2011 at 11:42pmThis is not hard. Just start with 2, and divide it into the number as many times as you can. Then try 3,5,7,... for all primes up to sqrt(N). Why stop there? because if one factis greater than sqrt(N), the other factor will be less.

18

2*9

2*3*3 = 2*3^2

480

2*240

2*2*120

2*2*2*60

2*2*2*2*30

2^5 * 15

2^5 * 3 * 5

640

2^6 * 10

2^7 * 5

165/180

3*5*11/2*2*3*3*5

11/2*2*3

11/12

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