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11 Aug 2021, 02:00
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
68% (01:55) correct
32%
(02:02)
wrong
based on 184
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Is \(xy < 0\) ?
(1) \(\frac{y − n}{(x - (n + 1))} = 1\)
(2) \(x(x - 1) < 0\)
(1) \(\frac{y − n}{(x - (n + 1))} = 1\)
(2) \(x(x - 1) < 0\)
11 Aug 2021, 02:09
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Is xy < 0 ? --> Are x,y non 0 numbers having the opposite signs ?
1) 1 = x - y
5-4 = 1, 4*5 = 20, Positive
-2-1 = -3, -3*1 = -3, Negative
Not sufficient
2) x(x-1) < 0 --> x is > 0, x < 1 -> x is b/w 0 and 1. Nothing about y.
Combining both: y = x -1
x (x-1) < 0 - THus sufficient.
C
1) 1 = x - y
5-4 = 1, 4*5 = 20, Positive
-2-1 = -3, -3*1 = -3, Negative
Not sufficient
2) x(x-1) < 0 --> x is > 0, x < 1 -> x is b/w 0 and 1. Nothing about y.
Combining both: y = x -1
x (x-1) < 0 - THus sufficient.
C
DHRJ0032
Joined: 27 Feb 2020
Last visit: 20 Dec 2023
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Given Kudos: 124
Location: India
Concentration: Finance, Operations
Schools: Owen '25 (II)
GPA: 4
WE:Operations (Aerospace and Defense)
11 Aug 2021, 02:43
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are x and y of opposite sign ?
1)y-n=x-n-1
y=x-1
x=2,y=1 NO
x=0,y=-1 NO
x=-1,y=-1 NO
SUFFICIENT.
2)0<x<1 nothing about y.
INSUFFICIENT.
A it is.
Posted from my mobile device
1)y-n=x-n-1
y=x-1
x=2,y=1 NO
x=0,y=-1 NO
x=-1,y=-1 NO
SUFFICIENT.
2)0<x<1 nothing about y.
INSUFFICIENT.
A it is.
Posted from my mobile device
