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30 Aug 2019, 06:23
Kudos
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
55% (01:12) correct
45%
(01:11)
wrong
based on 47
sessions
History
Date
Time
Result
Not Attempted Yet
If y is an integer, is y < -5 ?
(1) y^2 > 25
(2) y^3 < -25
(1) y^2 > 25
(2) y^3 < -25
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
30 Aug 2019, 06:42
Kudos
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y is an integer---- (given)
is y< -5?
STATEMENT (1)--- \(Y^2\)>25
(Y+5)(Y-5)>0
Y belongs to (-∞,-5)⋃(5,∞)
if y = -6 YES
if y = 6 NO
hence , INSUFFICIENT
STATEMENT (2)----\(y^3\)<-25
if y = -6 then YES
if y= -4 then NO
hence, INSUFFICIENT
combining both (1)&(2)
\(y^3\)<-25 is not valid if y belongs to (5,∞)
so possible value of y for both statements to be true (-∞,-5)
for y (-∞,-5) ---y is always <-5 so SUFFICIENT
C is the correct answer
is y< -5?
STATEMENT (1)--- \(Y^2\)>25
(Y+5)(Y-5)>0
Y belongs to (-∞,-5)⋃(5,∞)
if y = -6 YES
if y = 6 NO
hence , INSUFFICIENT
STATEMENT (2)----\(y^3\)<-25
if y = -6 then YES
if y= -4 then NO
hence, INSUFFICIENT
combining both (1)&(2)
\(y^3\)<-25 is not valid if y belongs to (5,∞)
so possible value of y for both statements to be true (-∞,-5)
for y (-∞,-5) ---y is always <-5 so SUFFICIENT
C is the correct answer
30 Aug 2019, 07:46
Kudos
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shridhar786
Why won't it be B only?
As you have mentioned that y^3<-25. and by taking values of y< -6 and -4. Both are less than -25. so it gives a definite answer
Why won't it be B only?
As you have mentioned that y^3<-25. and by taking values of y< -6 and -4. Both are less than -25. so it gives a definite answer
