pq <> 0. Is pq positive? 1. p and q are integers 2. : DS Archive
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# pq <> 0. Is pq positive? 1. p and q are integers 2.

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pq <> 0. Is pq positive? 1. p and q are integers 2. [#permalink]

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03 Aug 2005, 05:13
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pq <> 0. Is pq positive?

1. p and q are integers
2. Neither p nor q is a natural number
Senior Manager
Joined: 04 May 2005
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Location: CA, USA
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03 Aug 2005, 15:32
qpoo says: B

from 1), => p and q can be one +, and one -, therefore iusuff
from 2) and stem, => p < 0 and q < 0, therefore pq > 0
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04 Aug 2005, 05:15
Dan wrote:
pq <> 0. Is pq positive?

1. p and q are integers
2. Neither p nor q is a natural number

ok.

A insuff.

B. insuff ==> = -1*-1 = 1 ==>+
= -1*1/2 ==> - (negative fraction)

A&B ==> integers and both negative ==> suff.

C.
Re: DS-integers,,,,   [#permalink] 04 Aug 2005, 05:15
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