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28 May 2008, 00:52
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If Z is an integer, is 22 a factor of Z?
(1) 22 is a factor of 15Z.
(2) 22 is a factor of 16Z.
A) Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.
B) Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.
C) Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.
D) Either statement BY ITSELF is sufficient to answer the question.
E) Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question
(1) 22 is a factor of 15Z.
(2) 22 is a factor of 16Z.
A) Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.
B) Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.
C) Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.
D) Either statement BY ITSELF is sufficient to answer the question.
E) Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question
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28 May 2008, 01:03
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kapilnegi
A
The question is similar to Z is divisible by 2 and 11?
1. 3*5Z is divisible by 2 and 11, so Z must divisible by 2 and 11. suff
2. 16Z is divisible by 11 and 2, you can be sure that z is divisible by 11 but you can not sure that z itself divisible by 2. Not suff
28 May 2008, 08:24
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kapilnegi
Essentially is z/22? is z/11*2?
1: Yes b/c 15z --> 3*5*z/2*11 says its divisble by 22.
2: We dont know b/c 16 has several 2's in it.
A
