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Joined: 30 May 2009
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Re: General strategy for Number Properties Test [#permalink]
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04 Aug 2009, 16:12
I plug numbers too....but I find it quick.....here is what I did....
(1) Remainder is 1 when divided by 4. So numbers could be
1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41.....etc (keep adding 4...) But as you can all these numbers do not give the same remainder when divided by 3. INSUFF.
(1) Remainder is 6 when divided by 7. So numbers could be
6, 13, 20, 27, 34, 41.....etc (keep adding 7...) But as you can all these numbers do not give the same remainder when divided by 3. INSUFF.
Combine (1) and (2). Pick any 2 common numbers out the above lists.
13 and 41 are present in boith the lists. But 13 gives a remainder of 1 and 41 gives remainder of 2 when divided by 3. Hence INSUFF.
Answerr is E. Whats the OA???
