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# If the successive tick marks shown on the number line above are equall

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Math Expert
Joined: 02 Sep 2009
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If the successive tick marks shown on the number line above are equall [#permalink]

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17 Sep 2017, 03:10
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43% (00:30) correct 57% (00:27) wrong based on 39 sessions

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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 x?

(1) y = 1.5
(2) y – x = 1.2

[Reveal] Spoiler:
Attachment:

image005.gif [ 949 Bytes | Viewed 506 times ]
[Reveal] Spoiler: OA

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Kudos [?]: 128871 [0], given: 12183

Intern
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If the successive tick marks shown on the number line above are equall [#permalink]

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17 Sep 2017, 23:55
From question we can say D/8=|y-x|

Statement 1 : D/8= |1.5-X| .... Not sufficient
Statement 2 : D/8= 1.2....we can derive D......Hence X can be determined and statement 2 is sufficient........Answer is B

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Re: If the successive tick marks shown on the number line above are equall [#permalink]

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18 Sep 2017, 01:58
I got this wrong earlier and i may be wrong again lol

I see 8 "open boxes" equally spaced, but i also got to keep in mind this is a number line. Can be negative to zero to positive.

(1) Insufficient because we don't know x and the distance between each tick.

(2) 4/8 of the total boxes = distance between y and x ; 1/2 B = 1.2 ; B = 2.4 (total) ; 2.4/8 = 0.3

B

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Re: If the successive tick marks shown on the number line above are equall [#permalink]

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18 Sep 2017, 02:20
Bunuel wrote:

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 x?

(1) y = 1.5
(2) y – x = 1.2

[Reveal] Spoiler:
Attachment:
image005.gif

Hi Bunuel,

I have a doubt in this question, are we to assume that the starting of these intervals, i.e., the one behind x, is "0".
If it is "0", then stmt B would be sufficient. Or else, we need both the statements to solve this.
Please excuse me if my understand is not enough/wrong here. But, please do throw some light on this doubt of mine.

Regards,
Kishore

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Re: If the successive tick marks shown on the number line above are equall [#permalink]

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18 Sep 2017, 12:36
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Shouldn't the answer be D? It says the ticks are equally spaced. So if Y, the fifth tick, is 1.5 then X, the first tick, should be 0.3. Statement 1 is sufficient.
The distance between Y and X, 4 tickets, is 1.2 so X=0.3 and Y=1.5
Statement 2 is also sufficient.

Am I missing something here?

Kudos [?]: 4 [1], given: 34

Intern
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Re: If the successive tick marks shown on the number line above are equall [#permalink]

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19 Sep 2017, 07:49
rajudantuluri wrote:
Shouldn't the answer be D? It says the ticks are equally spaced. So if Y, the fifth tick, is 1.5 then X, the first tick, should be 0.3. Statement 1 is sufficient.
The distance between Y and X, 4 tickets, is 1.2 so X=0.3 and Y=1.5
Statement 2 is also sufficient.

Am I missing something here?

Looking back at this I made the classic mistake of taking in statement 1 when viewing statement 2. The distance between Y and X is 1.2 that could be a range of values that satisfy this equation. X should be 1.3 and Y could be 2.5 and still Y-X=1.2 So Statement 2 is not sufficient.

I hope statement 1 alone is sufficient now unless I have an enlightenment again later today :D

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Re: If the successive tick marks shown on the number line above are equall   [#permalink] 19 Sep 2017, 07:49
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