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Darden2010
Joined: 30 Mar 2007
Last visit: 22 Jul 2020
Posts: 493
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Schools: Darden '15
GMAT Date: 12-07-2011
Updated on: 24 Jun 2008, 10:16
Originally posted by Darden2010 on 28 Nov 2007, 03:23.
Last edited by Darden2010 on 24 Jun 2008, 10:16, edited 1 time in total.
Last edited by Darden2010 on 24 Jun 2008, 10:16, edited 1 time in total.
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Hi there,
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28 Nov 2007, 03:37
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E
From the root we know that n must be in {2,5,8,11...} and t must be in {3,8,13,18...}
1 narrows the possible values of n to {17,32,47..}
If we try 17 x 3 we get 51, divided by 15 remainder = 6
If we try 17 x 8 we get 136, divided by 15 remainder = 1
Insufficient
2 narrows the possible values of n to {18,33,48...}
If we try 2 x 18 we get 36, divided by 15 remainder = 6
If we try 5 x 18 we get 90, divided by 15 remainder = 0
Insufficient
Both together
17x18 = 306, divided by 15 remainder = 6
32 x 18 = 576 divided by 15 remainder = 6
17x 33 = 561 divided by 15 remainder = 6
32 x 33 = 726 divided by 15 remainder = 6
Seems to work, I say sufficient.
Now can someone tell me the easy way!
From the root we know that n must be in {2,5,8,11...} and t must be in {3,8,13,18...}
1 narrows the possible values of n to {17,32,47..}
If we try 17 x 3 we get 51, divided by 15 remainder = 6
If we try 17 x 8 we get 136, divided by 15 remainder = 1
Insufficient
2 narrows the possible values of n to {18,33,48...}
If we try 2 x 18 we get 36, divided by 15 remainder = 6
If we try 5 x 18 we get 90, divided by 15 remainder = 0
Insufficient
Both together
17x18 = 306, divided by 15 remainder = 6
32 x 18 = 576 divided by 15 remainder = 6
17x 33 = 561 divided by 15 remainder = 6
32 x 33 = 726 divided by 15 remainder = 6
Seems to work, I say sufficient.
Now can someone tell me the easy way!
28 Nov 2007, 06:14
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Raffle,
Looks like you derived C as an answer but you started by saying E is the answer..... Or Did I miss something..
I did the same calc got C as the answer. Looking for the shortcut too..
Looks like you derived C as an answer but you started by saying E is the answer..... Or Did I miss something..
I did the same calc got C as the answer. Looking for the shortcut too..
