Integers

Yups me too got A

Is this question from McGraw hill? I have seen a lot of errors in their practice tests. The answer should be A.

Yes it is.

Do you know if the difficulty level of McGraw Hill is closed to the real exam. I find them much easier than Power Prep and Kaplan. What was your expeirence about the relative difficulty.

I think 95% of the questions are of difficulty 400-500 and the scoring of these tests is based on percentage of questions you do right.I am doing these tests to develop stamina for just sitting in the exam for 4 hours.

YES it DOES in both equations...So D

From (2), either q OR n must equal 0, so we can't answer the original question. The answer should be (A).

I agree with D , because to test the values of both the equation when you substitue n = 0 , both the equations are valid . Hence the answer D.

malolakrupa wrote:I agree with D , because to test the values of both the equation when you substitue n = 0 , both the equations are valid . Hence the answer D.

(D) is correct only if EACH statement by ITSELF is sufficient to answer the question.

If we look at statement (2) alone, we get:

q((2-n) - (2+n)) = 0

q(2 - n - 2 - n) = 0

q(-2n) = 0

-2qn = 0

qn = 0

So, we can conclude that EITHER q OR n must be 0, but we have no way of knowing which one it is.

Therefore, statement (2) is NOT sufficient on its own and we should choose:

(A) statement 1 is sufficient on its own but statement (2) is insufficient on its own.