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WpackAlumDukeBound
Joined: 08 Jan 2013
Last visit: 20 Aug 2013
Posts: 18
Given Kudos: 18
Status:Attending Duke in May!
Location: United States (NC)
Concentration: Leadership, Strategy
Schools: Duke Fuqua (M) Kenan-Flagler '16 (A)
GMAT 1: 640 Q42 V35
Updated on: 12 Feb 2013, 05:55
Originally posted by WpackAlumDukeBound on 12 Feb 2013, 05:54.
Last edited by Bunuel on 12 Feb 2013, 05:55, edited 1 time in total.
Last edited by Bunuel on 12 Feb 2013, 05:55, edited 1 time in total.
Edited the question and added the OA.
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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:
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Question Stats:
42% (01:22) correct
58%
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based on 144
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If x, y and z are different integers, is x divisible by 11?
(1) xyz is divisible by 22 and 33
(2) yz is divisible by 72
(1) xyz is divisible by 22 and 33
(2) yz is divisible by 72
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
12 Feb 2013, 06:01
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If x, y and z are different integers, is x divisible by 11?
(1) xyz is divisible by 22 and 33. Given that xyz is a multiple of 22=2*11 and 33=3*11, thus xyz is a multiple of 2*3*11=66. Now, if x=1 and yz=66, the answer is NO but if x=11 and yz=66, the answer is YES. Not sufficient.
(2) yz is divisible by 72. Nothing about x. Not sufficient.
(1)+(2) Still insufficient, for example if x=1 and yz=66*72, the answer is NO but if x=11 and yz=66*72, the answer is YES. Not sufficient.
Answer: E.
(1) xyz is divisible by 22 and 33. Given that xyz is a multiple of 22=2*11 and 33=3*11, thus xyz is a multiple of 2*3*11=66. Now, if x=1 and yz=66, the answer is NO but if x=11 and yz=66, the answer is YES. Not sufficient.
(2) yz is divisible by 72. Nothing about x. Not sufficient.
(1)+(2) Still insufficient, for example if x=1 and yz=66*72, the answer is NO but if x=11 and yz=66*72, the answer is YES. Not sufficient.
Answer: E.
12 Feb 2013, 09:02
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Statement 1: either x could be 11 or y could be 11 or z could be 11. Insufficient.
Statement 2: No information about x. Insufficient.
Combined 1+2: x could be 1 and y could be 66 and z could be 72 or x could be 11 y could be 66 and z could be 72. Answer E.
Statement 2: No information about x. Insufficient.
Combined 1+2: x could be 1 and y could be 66 and z could be 72 or x could be 11 y could be 66 and z could be 72. Answer E.
