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# In a single row of yellow, green and red colored tiles,

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Senior Manager
Joined: 15 Aug 2007
Posts: 252
Schools: Chicago Booth
In a single row of yellow, green and red colored tiles, [#permalink]

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11 Mar 2008, 09:10
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In a single row of yellow, green and red colored tiles, every red tile is preceded immediately by a yellow tile and every yellow tile is preceded immediately by a green tile. What color is the 24th tile in the row?

(1) The 18th tile in the row is not yellow.

(2) The 19th tile in the row is not green.
Director
Joined: 10 Sep 2007
Posts: 938
Re: DS - MGMAT question - Row of tiles [#permalink]

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11 Mar 2008, 11:56
Question says RYG should in sequence but does not say that G should be followed by Red or Yellow.

Statement 1:
The 18th tile in the row is not yellow.
May mean 18th tile is Red or Green so not sufficient.

Statement 2:
The 19th tile in the row is not green.
May mean 19th tile is Red or Yellow so not sufficient.

Combining Both Statements:
Says 18th is Red then we have R Y (also fulfilling second statement that it is not green)
Says 18th is Red then we have G, then at 19th we can have Either R (also fulfilling second statement that it is not green)

So there is no definite answer.

Director
Joined: 01 May 2007
Posts: 793
Re: DS - MGMAT question - Row of tiles [#permalink]

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11 Mar 2008, 12:16
I think it is C, but C does seem like a to obvious of an answer.
Current Student
Joined: 28 Dec 2004
Posts: 3357
Location: New York City
Schools: Wharton'11 HBS'12
Re: DS - MGMAT question - Row of tiles [#permalink]

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11 Mar 2008, 13:02
I get E as well..24th tile could be Green or Red
Manager
Joined: 12 Oct 2007
Posts: 57
Re: DS - MGMAT question - Row of tiles [#permalink]

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11 Mar 2008, 17:38
Isn't the sequence GYR? thus st 1 and st 2 together (C) could be the answer?
18 G
19 Y
20 R...24 G

I'm a math tard so don't trust me on this...and maybe i'm reading it wrong but it says precedes
______________________________________________________________________________

I knew it was too easy to pick C! Tricky... thanks for the explanation!

Last edited by ocprep on 11 Mar 2008, 20:25, edited 1 time in total.
Senior Manager
Joined: 15 Aug 2007
Posts: 252
Schools: Chicago Booth
Re: DS - MGMAT question - Row of tiles [#permalink]

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11 Mar 2008, 19:38
abhijit_sen wrote:
Question says RYG should in sequence but does not say that G should be followed by Red or Yellow.

Statement 1:
The 18th tile in the row is not yellow.
May mean 18th tile is Red or Green so not sufficient.

Statement 2:
The 19th tile in the row is not green.
May mean 19th tile is Red or Yellow so not sufficient.

Combining Both Statements:
Says 18th is Red then we have R Y (also fulfilling second statement that it is not green)
Says 18th is Red then we have G, then at 19th we can have Either R (also fulfilling second statement that it is not green)

So there is no definite answer.

That's the trick.. the sequence could be G, Y, R, G, G, G...

OA is E.
Re: DS - MGMAT question - Row of tiles   [#permalink] 11 Mar 2008, 19:38
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