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02 Sep 2023, 08:00
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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:
65%
(hard)
Question Stats:
45% (01:28) correct
55%
(01:38)
wrong
based on 51
sessions
History
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Not Attempted Yet
If \(x^3y^2 = 200\), and y is an integer, what is the value of y?
(1) x is an integer
(2) y > 0
(1) x is an integer
(2) y > 0
02 Sep 2023, 08:12
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(1) x is an integer
x can be 2/-2
8y^2=200
y^2=25
y can be 5 or -5
We aren't getting a unique value for y.
Statement I is insufficient.
(2) y > 0
200= 2*2*2*5*5/2*2*2*(-5)*(-5)
But y>0
So, y must be 5.
Statement II alone is insufficient.
Ans is option B
Posted from my mobile device
x can be 2/-2
8y^2=200
y^2=25
y can be 5 or -5
We aren't getting a unique value for y.
Statement I is insufficient.
(2) y > 0
200= 2*2*2*5*5/2*2*2*(-5)*(-5)
But y>0
So, y must be 5.
Statement II alone is insufficient.
Ans is option B
Posted from my mobile device
02 Sep 2023, 08:16
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divyadna
What if y =1 and x^3 be 200 ? We are not given x is integer in statement 2. We need statement 1 for that.
IMHO the answer should be C
