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13 Dec 2012, 06:19
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D
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Difficulty:
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75% (01:15) correct
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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
Attachment:
Number line.png [ 3.62 KiB | Viewed 48343 times ]
13 Dec 2012, 06:23
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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?
x = 3 ticks.
y = 7 ticks.
(1) x = 1/2 --> x = 1/2 = 3 ticks --> 1 tick = 1/6, thus y = 7 ticks = 7/6. Sufficient.
(2) y - x = 2/3 --> the distance between x and y is 4 ticks, thus 2/3 = 4 ticks --> 1 tick = 1/6, thus y = 7 ticks = 7/6. Sufficient.
Answer: D.
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13 Dec 2012, 06:30
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Let one interval = a. y = 7a, x = 3a. So we are only required to find a.
1) 3a = 1/2. a can be found. Sufficient
2) 7a - 3a = 2/3. 4a = 2/3. a can be found. Sufficient.
Answer is D.
1) 3a = 1/2. a can be found. Sufficient
2) 7a - 3a = 2/3. 4a = 2/3. a can be found. Sufficient.
Answer is D.
