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A and B are integers, is (0.5)AB > 1 ?

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Bunuel
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A and B are integers, is (0.5)AB > 1 ? [#permalink] New post   19 Jul 2016, 03:32
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A
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D
E

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Question Stats:

7% (00:47) correct 93% (01:24) wrong based on 27 sessions
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A and B are integers, is (0.5)AB > 1 ?

(1) A is positive integer and B is negative integer.
(2) A and B are two consecutive integers.



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D
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Re: A and B are integers, is (0.5)AB > 1 ? [#permalink] New post   19 Jul 2016, 03:50
Bunuel wrote:
A and B are integers, is (0.5)AB > 1 ?

(1) A is positive integer and B is negative integer.
(2) A and B are two consecutive integers.



Given (0.5)AB > 1

Then AB > 2 ?

Stat 1: A is positive integer and B is negative integer. Whatever the value of A be , -ve value of B will make < 2...Insufficient.

Stat 2 : A and B are two consecutive integers.

if A = 3 and B = 3 then AB > 2.
if A = -1 and B = -2 then AB > 2.
if A = 0 and B = 1 then AB < 2.... Insufficient.

Stat 1 + Stat 2 : Since AB are consecutive from 2 and B is -ve from 1 then A can be 0 or -ve value ( -1,0 ) < 2, if it ( -3, -2) > 2... different cases... Insufficient.

IMO E is correct answer.

OA please...will correct if I missed anything.
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Re: A and B are integers, is (0.5)AB > 1 ? [#permalink] New post   19 Jul 2016, 05:57
(0.5)AB>1? --> AB>2？

1) A+,B-, the result of A*B must be negative, thus A*B will always < 0, thus always < 2. 1) perfectly answers the question: No.
sufficient.

2) A=1, B=2, A*B=2
A=2, B=3, A*B=6
insufficient

A
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Re: A and B are integers, is (0.5)AB > 1 ? [#permalink] New post   19 Jul 2016, 06:13
A

question asksing AB>2

1)a is +ve and b is -ve

so AB always <0

suff

2)a and b cons integers.

so, ab>2 or ab=0 or ab<2

Answer - A
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Re: A and B are integers, is (0.5)AB > 1 ? [#permalink] New post   25 Jul 2016, 10:06
Expert Reply
msk0657 wrote:
Bunuel wrote:
A and B are integers, is (0.5)AB > 1 ?

(1) A is positive integer and B is negative integer.
(2) A and B are two consecutive integers.



Given (0.5)AB > 1

Then AB > 2 ?

Stat 1: A is positive integer and B is negative integer. Whatever the value of A be , -ve value of B will make < 2...Insufficient.

Stat 2 : A and B are two consecutive integers.

if A = 3 and B = 3 then AB > 2.
if A = -1 and B = -2 then AB > 2.
if A = 0 and B = 1 then AB < 2.... Insufficient.

Stat 1 + Stat 2 : Since AB are consecutive from 2 and B is -ve from 1 then A can be 0 or -ve value ( -1,0 ) < 2, if it ( -3, -2) > 2... different cases... Insufficient.

IMO E is correct answer.

OA please...will correct if I missed anything.


If you are saying "Stat 1: A is positive integer and B is negative integer. Whatever the value of A be , -ve value of B will make < 2" , then it means we have a definite answer to this question,i.e. NO. Hence it is sufficient.
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Re: A and B are integers, is (0.5)AB > 1 ? [#permalink] New post   26 Jul 2016, 12:23
Bunuel wrote:
A and B are integers, is (0.5)AB > 1 ?


I don't understand this one, Bunuel, may I have some assistance?

Answer below is not the OA

\(AB > 2\)

(1) A is positive integer and B is negative integer.

\(AB < 0\), sufficient.

(2) A and B are two consecutive integers.

A = 2, B = 3, AB > 2
A = 1, B = 0, AB < 2

not sufficient.

Show Spoiler
(A) statement 1 alone is sufficient, but statement 2 alone is not sufficient to answer the question
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Re: A and B are integers, is (0.5)AB > 1 ? [#permalink] New post   26 Jul 2016, 12:30
msk0657 wrote:
Bunuel wrote:
A and B are integers, is (0.5)AB > 1 ?

(1) A is positive integer and B is negative integer.
(2) A and B are two consecutive integers.



Given (0.5)AB > 1

Then AB > 2 ?

Stat 1: A is positive integer and B is negative integer. Whatever the value of A be , -ve value of B will make < 2...Insufficient.

Stat 2 : A and B are two consecutive integers.

if A = 3 and B = 3 then AB > 2.
if A = -1 and B = -2 then AB > 2.
if A = 0 and B = 1 then AB < 2.... Insufficient.

Stat 1 + Stat 2 : Since AB are consecutive from 2 and B is -ve from 1 then A can be 0 or -ve value ( -1,0 ) < 2, if it ( -3, -2) > 2... different cases... Insufficient.

IMO E is correct answer.

OA please...will correct if I missed anything.


S1
Always less than 2
So suff
Wondering why answer is D :(


Sent from my iPad
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Re: A and B are integers, is (0.5)AB > 1 ? [#permalink] New post   26 Aug 2016, 00:11
Bunuel,
Can you please tell us the official solution that drives the answer D?



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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Re: A and B are integers, is (0.5)AB > 1 ? [#permalink]
26 Aug 2016, 00:11
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