@freckles Please, what is it and how to solve? http://gyazo.com/459407d28e6cdad59dc032766fc7ac02

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@freckles Please, what is it and how to solve? http://gyazo.com/459407d28e6cdad59dc032766fc7ac02

Mathematics
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I have another one and not sure what they want me to do Appreciate any tips. http://gyazo.com/7e43f8ee6a66384dfb6b5689e3bc447d
I don't get the first one seems like things are missing
I don't understand what the first question is even asking to be honest, it seems incomplete.

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The second question: The first statement only implies that if we plug in \(a\ne0\) that \(b \ne 0\) which doesn't specify anything on its own, we still have any other combination we can pick for a and b. The second statement is identical to the question's statement, just add 9b to both sides and multiply both sides by 5. So it doesn't give us any new information either.
So??? what is the answer?
What are you confused about?
This is the first time I see this kind of question. I don't know what the goal of the problem. What am I supposed to do?
could you fix up number 6 a little
I interpreted this as asking if we had enough information to solve uniquely for the value of a and b.
To your logic, the last one is the corrext answer, right?
@myininaya what do you mean by "fix up"? How can I fix it?
I mean to make it readable
it makes no sense as is
This is the site where I am working http://mba.graduateshotline.com/gmat_quantitative_test.html#.VZSVSEZRIoo
Well the question is literally asking if that statement is true which is basically identical to my statement that a=b or a=/=b. We can't determine the truth value of it based on the information given so yes, the last answer is correct.
yep they don't make it make anymore sense
I'm gonna take a guess: \[=x+\frac{x}{2}-2 \]
\[=10\]
\[10=w+\frac{w}{2}-2 \]
Yeah it's nonsense, they don't even say what w is supposed to represent lol
\[20=2w+w-4 \\ 20=3w-4 \\ 24=3w \\ w=8\] but I didn't interpret what they so clearly meant :p
OMG!! I will fail for sure. Thanks for the help @Empty @myininaya
Well you won't fail if they can make the questions clear
It really is not clear what they are saying there
Thank you so much. Anyway, it is just 1 out of 10. hehehe... no failure.!!
Yeah failing this is equivalent to failing to answer someone when they ask you what's the length of potato? You shouldn't feel too bad about some of these questions lol.
I would be afraid to click anything on that site they might somehow try to hack my person information that is how screwed up some of the questions look
kidding a little
in number 4 which is the shaded region
the darker shade or the lighter shade
for this one its C :P and thats all i know xD http://gyazo.com/7e43f8ee6a66384dfb6b5689e3bc447d
I really don't understand how I can play with the symbols in 6 to get some better than what I already said like is there any other way to read =x+x/2-2 if that is really what they meant to write and it has to be =10 in order to even find w
ok I think number 6 should not have that -2 there: the answer is 20/3 \[=x+\frac{x}{2} \\ =w+\frac{w}{2} =10 \\ \frac{3w}{2}=10 \\ w=\frac{2(10)}{3}=\frac{20}{3}\]
Ok for some reason 8 is D.... I thought we were suppose to pick 1 or 2 or both to see which implied y<0 well if -5y>0 then y<0 but if -y^5<0 then y^5>0 and so y>0 so I don't see how 8 is D
anyways I'm going to stop playing with this
@ikram002p @Loser66 "for this one its C :P and thats all i know xD http://gyazo.com/7e43f8ee6a66384dfb6b5689e3bc447d " I think it's B actually, but the question is really poorly worded. I _think_ they are asking whether statement (1) alone implies 5a-9b=0 (P). Or if (2) alone implies P. Or if (1) and (2) implies P. etc. In this case 25a = 45b does imply 5a-9b = 0, so (B) is true.
yes B is correct for that one
1A 2A 3C 4A 5C 6A 7D 8D 9B 10B Imputing the above will give a score of 100
haha yeah i must made a silly typo
this is silly. First. If it is an operation (binary?) then it is a function from some AxAxA.... into some set B, depending if it is unary, binary, ...... Since it is implied that we can perform this operation on one value w, then it must be unary. So we have a function f:A->B. Now lut us rephrase the questions We have a function f s.t. f(x) =x+x/2+2 when x<= 10. Now the fact that x<= 10 implies that the set A is a subset of R. So that f(w) is not defined.
But ok let us say there is some set A, s.t. w,10 are both in A. Well now we can have the function be defined for both 10 and w. But then the question is, what is the value of w. which of course we do not know since we argued that this set must contain 10 and w and we were not given the definition of the set, so this cant be a function as they come with a rule by definition.
sorry, it's a special day in Oregon and I got meta.
@zzk0ck3r When you have time, please continue your argument. @myininaya Thanks for trying. You tried on it and got 100. So that you didn't know what is going on when you get wrong. If you get something wrong, you have no way to know which one is wrong and how to fix it. Because they give you the score and the percentage only, no explanation, no point out the wrong answer. Anyway, that is the good site to practice solving basic math problems in shortest time. I am looking for GRE for math students. If you know some free site, please send me the link. Much appreciate. :)
That was it, either way we get something that does not make sense
For a function, you must not only have it be well defined and defined everywhere, you must have a rule for the map. In the second case we have no way of assigning that rule to w because we dont know what w is :)
A function is a set of ordered pairs and without the rule we cant make the pairs, so we don't have a function, so we don't have an operation.
Thank you for the explanation. :)

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