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13 Dec 2015, 05:27
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
79% (00:49) correct
21%
(01:01)
wrong
based on 131
sessions
History
Date
Time
Result
Not Attempted Yet
17 Dec 2015, 06:45
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Bunuel
(1) n/5 = m/4
4n = 5m
replace 4n = 5m in the original question
4n – 5m
= 5m - 5m
= 0
SUFFICIENT
(2) n/4 = m/5
5n = 4m
n = 4/5 m
replace n = 4/5 m in the original question
4n – 5m
= 4(4/5 m) - 5m
= 16/5 m - 5m
= -9/5 m
we still do not know what is m
INSUFFICIENT
My Choice : A
17 Dec 2015, 18:26
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We are asked to find the value of 4n-5m.
Statement 1:
n/5 = m/4
This gives us 4n=5m or 4n-5m=0 SUFFICIENT.
Statement 2:
n/4 = m/5
5n=4m which implies n= 4m/5
Substituting value of n in 4n-5m we have - 4(4m/5)-5m i.e. m(-9/5) which clearly depends on value of m.
Hence insufficient.
Answer A.
Statement 1:
n/5 = m/4
This gives us 4n=5m or 4n-5m=0 SUFFICIENT.
Statement 2:
n/4 = m/5
5n=4m which implies n= 4m/5
Substituting value of n in 4n-5m we have - 4(4m/5)-5m i.e. m(-9/5) which clearly depends on value of m.
Hence insufficient.
Answer A.
