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mgmat DS

by niraj_a » Fri Dec 05, 2008 7:46 pm
i think there is a small flaw in this DS....OA after some attempts

If the sum of the digits of the positive two-digit number x is 4, what is the value of x?

(1) x is odd.

(2) Twice the value of x is less than 44.
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Source: — Data Sufficiency |
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by dmateer25 » Fri Dec 05, 2008 8:11 pm
Stmt 1

x can be 13 or 31.

Insuff


Stmt 2

only number x can be is 13 .

Suff


I choose B
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by niraj_a » Sat Dec 06, 2008 5:44 am
good stuff! i see my mistake now - in statement 2, i assumed 04 to be a valid number too...aarggghhhh!!!!!
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by ronniecoleman » Thu Dec 11, 2008 3:56 am
IMO B
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by NicoFalcon » Thu Dec 11, 2008 7:04 am
The possible values for 2 digit numbers which the sum of its positive digits is 4 are:

13
22
31

(1) Tells us that the number is odd, so it can be either 13 or 31. Insuff
(2) Tells us that xx*2 is less than 44, which only leaves 13 a possible alternative. 2 is sufficient alone. So B
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