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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?

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

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17 Sep 2017, 22:55

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

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

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18 Sep 2017, 01:20

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?

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.

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

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18 Sep 2017, 11:36

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This post received KUDOS

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.

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

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19 Sep 2017, 06:49

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

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?

Hi Bunuel, There may be a typo in the OA. Since we do not what this number line represents, we may be looking at OA as C.. 1) y=1.5.. We do not know the left corner is 0, if it is then x is 1.5/5*1=0.3.. It could be that each gap is 0.1, so x becomes 1.5-0.1*4=1.1 Insufficient 2) y-x=1.2 But we do not know what is y so insuff.

Combined.. Y-x=1.2 1.5-x=1.2 x=1.5-1.2=0.3 C
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