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

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Manager
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In a single row of yellow, green and red colored tiles, [#permalink] New post 04 Jul 2007, 16:02
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A
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C
D
E

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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.
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Re: DS - Tile in a row [#permalink] New post 04 Jul 2007, 16:33
iamba wrote:
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.


Stmnt 1 insuff. 18 could be green or red

Stmnt 2 insuff. 19 could be yellow or red.

Now I'm not sure about this problem... are we suppose to assume that the order is like so Green Yellow Red Green Yellow Red etc...

b/c if not, there is no restriction on the amount of greens. it could be GGGGGGGGGGGGGGGGGGYRGGGGG

if we are to assume GYR, then 18 is Green 19 Yellow 20 is Red. which makes 24 Green.

Wuts OA, my guess depending on the assumptions C or E.
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 [#permalink] New post 04 Jul 2007, 17:43
St1:
18th tile is red or green. If it's red, then 24th tile -> red. If it's green, then 24th tile -> green

St2:
19th tile is yellow or red. If it's yellow, then 24th tile -> yellow. If it's green then 24th tile -> red

Using both, it says 18 tile is not yellow, 19th tile is not green, then 18th tile must be green, then 19th tile will be yellow and 24th tile will be yellow.

Ans C
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 [#permalink] New post 04 Jul 2007, 17:44
ywilfred wrote:
St1:
18th tile is red or green. If it's red, then 24th tile -> red. If it's green, then 24th tile -> green

St2:
19th tile is yellow or red. If it's yellow, then 24th tile -> yellow. If it's green then 24th tile -> red

Using both, it says 18 tile is not yellow, 19th tile is not green, then 18th tile must be green, then 19th tile will be yellow and 24th tile will be yellow.

Ans C


I assume that the colors will rotate, and anything behind green won't be just all green or something else.
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Re: DS - Tile in a row [#permalink] New post 04 Jul 2007, 23:46
iamba wrote:
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.


Answer: E

Though it may sound like there is one, no pattern is established either by the question stem, or by stat 1 and 2.
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 [#permalink] New post 10 Jul 2007, 19:58
OA is E because green can repeat
  [#permalink] 10 Jul 2007, 19:58
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In a single row of yellow, green and red colored tiles,

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