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tick.PNG If the successive tick marks shown on the number

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Manager
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tick.PNG If the successive tick marks shown on the number [#permalink] New post 26 Mar 2011, 08:04
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

84% (01:21) correct 16% (00:28) wrong based on 25 sessions
Attachment:
tick.PNG
tick.PNG [ 4.14 KiB | Viewed 3612 times ]

If the successive tick marks shown on the number line above are equally spaced and if x and y are the
numbers designating the end points of intervals as shown, what is the value of y ?
(1) x = 1/2
(2) y – x = 2/3



OA after a few posts
[Reveal] Spoiler: OA

Last edited by gtr022001 on 26 Mar 2011, 13:00, edited 1 time in total.
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Re: successive tick marks shown on the number line [#permalink] New post 26 Mar 2011, 08:12
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I think it's D.
S1 tells me that smallest division is 1/6 hence y is 7/6

S2 tells me that smallest division is 2/3 / 4 or 1/6. Hence y is 7/6

Essentially s1 and s2 provide the exact same information.

Hence D

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Re: successive tick marks shown on the number line [#permalink] New post 26 Mar 2011, 19:11
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INterval between each tick = t

=> x = 3t

Now from (1) x = 1/2

so t = 1/6

hence y = 7 * (1/t) = 7/6

which is sufficient

From (2)

x = 3t

y = 7t

=> 4t = 2/3

=> t = 1/6

Thus, y = 1/2 + 2/3 = 7/6

which is sufficient

Answer - D
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Re: successive tick marks shown on the number line [#permalink] New post 02 Apr 2011, 17:44
1. x = 1/2.

enough to find the that each division/spacing is 1/6
enough to find the value of y. (as y would be 4/6+x)

2. y-x = 2/3
=> y is at a distance of 2/3 from x.

enough to find out each spacing is 1/6
and that is enough to find out y.

Answer is D.
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Re: successive tick marks shown on the number line [#permalink] New post 04 Apr 2011, 20:58
(1) x = 1/2
If 3 units represent 1/2, one can find the value of y by unitary method

(2) y – x = 2/3
if 4 units represent 2/3, one can find the value of y by unitary method

So, D.
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Re: successive tick marks shown on the number line   [#permalink] 04 Apr 2011, 20:58
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