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If the prime numbers p and t are the only prime factors of

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If the prime numbers p and t are the only prime factors of [#permalink]

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New post 25 Jul 2009, 07:33
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If the prime numbers p and t are the only prime factors of the integer m, is m a multiple of (p^2).t?
A) m has more than 9 positive factors
B) m is multiple of p^3
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Re: Prime numbers [#permalink]

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New post 25 Jul 2009, 08:43
Answer is 'B'. Please post OA
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Re: Prime numbers [#permalink]

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New post 25 Jul 2009, 12:36
noboru wrote:
If the prime numbers p and t are the only prime factors of the integer m, is m a multiple of (p^2).t?
A) m has more than 9 positive factors
B) m is multiple of p^3


M = P^nT^z ,

question is asking whether n = >2

from a

assume that n=1,z= 4

factors become: 1,m,p,t,pt,t^2,t^3,t^4,t^2p,t^3p,t^4p........valid.............insuff

from b

if m = M = P^nT^z , and given n is at least 3.........suff

B
Re: Prime numbers   [#permalink] 25 Jul 2009, 12:36
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If the prime numbers p and t are the only prime factors of

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