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

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Manager
Joined: 28 Aug 2004
Posts: 205
Followers: 1

Kudos [?]: 1 [0], given: 0

pq <> 0. Is pq positive? 1. p and q are integers 2. [#permalink]  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
Posts: 284
Location: CA, USA
Followers: 1

Kudos [?]: 23 [0], given: 0

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
Manager
Joined: 28 Aug 2004
Posts: 205
Followers: 1

Kudos [?]: 1 [0], given: 0

Re: DS-integers,,,, [#permalink]  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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