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24 Sep 2012, 05:12
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
84% (01:04) correct
16%
(01:05)
wrong
based on 2415
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What is the tenths digit in the decimal representation of a certain number?
(1) The number is less than 1/3.
(2) The number is greater than 1/4.
(1) The number is less than 1/3.
(2) The number is greater than 1/4.
24 Sep 2012, 05:28
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SOLUTION
What is the tenths digit in the decimal representation of a certain number?
(1) The number is less than 1/3.
(2) The number is greater than 1/4.
Each statement alone is clearly insufficient. When taken together we have \(0.25<x<0.333...\). Hence the tenths digit can be 2 (for example if x= 0.251) or 3 (for example if x=0.3). Not sufficient.
Answer: E.
What is the tenths digit in the decimal representation of a certain number?
(1) The number is less than 1/3.
(2) The number is greater than 1/4.
Each statement alone is clearly insufficient. When taken together we have \(0.25<x<0.333...\). Hence the tenths digit can be 2 (for example if x= 0.251) or 3 (for example if x=0.3). Not sufficient.
Answer: E.
General Discussion
24 Sep 2012, 09:28
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Bunuel
lets assume N = 0.xyz...
(1)
N < 1/3
N < 0.333333
Now, N can be 0.234 or 0.3111 or 0.121212
Basically, tenths digit can be 0 or 1 or 2 or 3
So, we cant say what would be the tenths digit
hence not sufficient.
(2)
N > 1/4
N > 0.25
Now, here digit can be 2,3,4,5,6,7,8,9
Hence this is also not sufficient
combining (1) and (2), the tenths digit can be either 2 or 3.
So, we can't answer the exact digit.
Hence E
