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If r and s are +ve integers, is r/s an integer 1. Every

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If r and s are +ve integers, is r/s an integer 1. Every [#permalink] New post 25 Dec 2007, 06:25
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If r and s are +ve integers, is r/s an integer

1. Every factor of s is also a factor of r
2. every prime factor of s is also a prime factor of r

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Re: DS - factor and prime factors [#permalink] New post 25 Dec 2007, 12:08
gregspirited wrote:
If r and s are +ve integers, is r/s an integer

1. Every factor of s is also a factor of r
2. every prime factor of s is also a prime factor of r


R/S integer?

1. apparently S<R or S=R, thus Yes.

2. S=2*3*5=30, R=2*3*5*7=210. the same as 1 because any number can be prime factorized if not itself a prime factor. Yes

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 [#permalink] New post 25 Dec 2007, 19:34
1.sufficient. The same approach
2.not sufficient. For example r = 30, prime factor are 2, 3, 5. And s = 60, prime factors are also 2, 3, 5. But r/s is not an integer
  [#permalink] 25 Dec 2007, 19:34
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If r and s are +ve integers, is r/s an integer 1. Every

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