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#1 (permalink) |
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Within my grasp!
![]() ![]() Join Date: Nov 2005
Posts: 281
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remainder problem
What is the remainder when the positive integer n is divided by 3?
(1) The remainder when n is divided by 2 is 1. (2) The remainder when n + 1 is divided by 3 is 2. A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1) and (2) TOGETHER are NOT sufficient. OA is B. |
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#2 (permalink) |
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Eager!
![]() Join Date: Mar 2008
Posts: 90
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IMO - Ans is B
From statement 1) we know that n=odd since there is a remainder of 1 when divided by 2. ie all multiples of two are even. However, this info is INSUFF to know what the remainder is when n is divided by 3 since n could be 3 (so rem=0) or n could be 5 (rem=2). From statement 2) since we know that the remainder is 2 when n+1 is divided by 3, then the possible values of n+1 are 5, 8, 11, etc. And the remainder when n is divided by 3 is 1. So n=4,7,10, etc.. SUFF. |
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