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

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tick.PNG If the successive tick marks shown on the number [#permalink]

26 Mar 2011, 09:04

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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, 14:00, edited 1 time in total.

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Re: successive tick marks shown on the number line [#permalink]

26 Mar 2011, 09:12

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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]

26 Mar 2011, 20:11

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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]

02 Apr 2011, 18:44

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]

04 Apr 2011, 21:58

(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, 21:58

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

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

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

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