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14 Aug 2009, 14:58
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another DS problem from gmat club: answer seems to be wrong
A certain prime x is divided by 5 to result in a fraction. Then the fraction's numerator is increased by 4 and its denominator is doubled, after which the resulting fraction is reduced. If the denominator of the result is odd, what is x?
. 7
. 5
. 4
. 3
. 2
------------------------
GMAT club answer: 2
-------------------------
but 2 wouldn't meet the criteria shown in the problem. 2/5 = .4 but 6/10 = .6; .6> .4 ("after which resulting fraction is reduced")
This is the 2nd math problem I got where GMAT club answer was not correct. anybody else having the same issue?
Thanks
A certain prime x is divided by 5 to result in a fraction. Then the fraction's numerator is increased by 4 and its denominator is doubled, after which the resulting fraction is reduced. If the denominator of the result is odd, what is x?
. 7
. 5
. 4
. 3
. 2
------------------------
GMAT club answer: 2
-------------------------
but 2 wouldn't meet the criteria shown in the problem. 2/5 = .4 but 6/10 = .6; .6> .4 ("after which resulting fraction is reduced")
This is the 2nd math problem I got where GMAT club answer was not correct. anybody else having the same issue?
Thanks
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14 Aug 2009, 15:19
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santoshsingh
GMAT Club answer is correct.
By reducing the question means canceling out of common factor, which in this case is 2.
14 Aug 2009, 15:57
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[quote="santoshsingh"]another DS problem from gmat club: answer seems to be wrong
A certain prime x is divided by 5 to result in a fraction. Then the fraction's numerator is increased by 4 and its denominator is doubled, after which the resulting fraction is reduced. If the denominator of the result is odd, what is x?
. 7
. 5
. 4
. 3
. 2
x/5.....x+4/10 for that to be reduced and denom gives odd x has to be devisable by 2 the only even prime is 2 itself thus x is 2
A certain prime x is divided by 5 to result in a fraction. Then the fraction's numerator is increased by 4 and its denominator is doubled, after which the resulting fraction is reduced. If the denominator of the result is odd, what is x?
. 7
. 5
. 4
. 3
. 2
x/5.....x+4/10 for that to be reduced and denom gives odd x has to be devisable by 2 the only even prime is 2 itself thus x is 2
