Princeton Review
GRE Test. Tips?
- Thread starter KadeerQ
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Sorry i made the same mistake of not seeing that the tank were initially full.
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As @darth has mentioned, you do not need to add the final (100+100) to get your total number as that was a hypothetical situation.
Going back to basic algebra:
X=Y+600 ... (1)
X+100 = 3Y+300 ... (2) [If 100 were pumped into that is added]
(2) - (1) => 100 = 2Y -300 => Y=200=> X= 800
So total should be 200+800 = 1000.
As a double check: when you add 100 to each: Y would contain 300 and X would contain 900, which is 3 times 300.
Now if the question meant it was pumped OUT... then
X=Y+600 ... (1)
X-100 = 3Y-300 ... (2)
(2) -(1) => Y=400 => X=1000 hence total = 1400. Bingo!
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Devdeep you are making same mistake that i committed.Here tank is already full and pumping doesn't mean just putting more water as it indicates both direction movement of water.So if you are pumping it can mean either filling or emptying the tank .
I committed same mistake.
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@darth, @Shantanu.Kumar, Thanks Guys!!! I actually figured that right after posting my comment and hence edited it... Thanks again...
But the question says: "If 100 gallons of fuel are to be pumped into each tank," God!!! the INTO got me! :P
But the question says: "If 100 gallons of fuel are to be pumped into each tank," God!!! the INTO got me! :P
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Yeah i did the same @editing part.Its quite embarrassing
Damn this quoting option.:p
Damn this quoting option.:p
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This time I will post one for kadeer.....
A + b/c ÷ d/e
If any of the above variables are to be doubled to halve the equation, which one should it be?
See, this question took me about 3 minutes to figure out. There's got to be an easier way to save time.
I just plugged in numbers..... what numbers did you plug in to get E as answer??
A + b/c ÷ d/e
If any of the above variables are to be doubled to halve the equation, which one should it be?
See, this question took me about 3 minutes to figure out. There's got to be an easier way to save time.
I just plugged in numbers..... what numbers did you plug in to get E as answer??
My mistake. I meant the answer was D not E.
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Kadeer D can't be the answer either.
Actually you can't really double just one variable and half the equation.There is no solution to your problem.
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his question was wrong. he forgot to include the paranthesis. d is definitely the answer. if the question is not correct, then you cannot double any variable to halve the equation
Which of the following could be an area of an isosceles triangle if the perimeter is 18 and one side is 8?
a) 6
b) 12
c) 14
d) 16
e) 18
OK, sounds easy enough. Perimeter = a + b+ 8 = 18 thus other two sides must equal 10 as its an isosceles.
8+2 =
5+5 =
Should be the only ones that work to give two equal sides (isosceles). But none work.
This book is crap!
a) 6
b) 12
c) 14
d) 16
e) 18
OK, sounds easy enough. Perimeter = a + b+ 8 = 18 thus other two sides must equal 10 as its an isosceles.
8+2 =
5+5 =
Should be the only ones that work to give two equal sides (isosceles). But none work.
This book is crap!
babinu
XYZ
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If the sides are 8,5,5 the area turns out to be 12 (using hero's formula) and if they are 8,8,2 the area 3*sqrt(7) . Hence the answer is (b)
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