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A
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Difficulty:
15%
(low)
Question Stats:
75% (01:11) correct
25%
(01:15)
wrong
based on 284
sessions
History
Date
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Not Attempted Yet
If z is a multiple of 24, what is the remainder when z^2 is divided by 9?
(A) 0
(B) 1
(C) 2
(D) 4
(E) 6
(A) 0
(B) 1
(C) 2
(D) 4
(E) 6
27 Jan 2014, 06:11
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mendelay
z is a multiple of 24, means that z is a multiple of 3, therefore z^2 must be a multiple of 9.
Answer: A.
General Discussion
04 Sep 2009, 14:44
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this question will hardly take more than 30 seconds..
this is not data sufficiency problem, in which you have to test the answer by plugging different values..
this is problem solving question asking for a definite answer..So, the answer would be same whether z is 24 or any other multiple of 24.
Let z = 24 ; =>\(z^2 = 24*24\)
=>\(z^2 = 9*64\) ( divisible by 9)
this is not data sufficiency problem, in which you have to test the answer by plugging different values..
this is problem solving question asking for a definite answer..So, the answer would be same whether z is 24 or any other multiple of 24.
Let z = 24 ; =>\(z^2 = 24*24\)
=>\(z^2 = 9*64\) ( divisible by 9)
