If y=1+1/x where x>1, then y could equal to which of the following?
a. 1/5
b. 5/8
c. 9/7
d. 15.11
e. 8/7
Data sufficiency
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Take: y = 1 + 1/xNury Yeashfi wrote:If y = 1 + 1/x where x >1 , then y could equal to which of the following?
a. 1/5
b. 5/8
c. 9/7
d. 15.11
e. 8/7
Rewrite as: y = x/x + 1/x
Simplify: y = (x + 1)/x
So, we're looking for an answer choice that can be expressed as a fraction in which the numerator is 1 greater than the denominator.
Answer: E
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If x > 1, then 1/x is between 0 and 1. So 1 + (1/x) will be between 1 and 2, and answers C and E are both possible (for C, x = 7/2, and for E, x = 7). If there's a typo in D, and instead it's meant to read "15/11", then D is also possible (x = 11/4). It's only if the question tells you x is an integer that E becomes the lone correct answer among the choices, but the question doesn't tell us that.
So the question has two or three right answers, which can't happen on the GMAT  where is it from?
So the question has two or three right answers, which can't happen on the GMAT  where is it from?
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In the figure below AB=BC=CD. If the area of the Traingle CDE is 42,what is the area of the triangle ADG?
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similar triangle sides of CDE are 1/3 of the Side of ADG.
9 X Area of triangle CDE = area of Triangle ADG
Area of Triangle ADG =9 X 42
Area of Triangle ADG =378
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similar triangle sides of CDE are 1/3 of the Side of ADG.
9 X Area of triangle CDE = area of Triangle ADG
Area of Triangle ADG =9 X 42
Area of Triangle ADG =378