
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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November 27th, 2016, 04:08 PM  #1 
Newbie Joined: Nov 2016 From: usa Posts: 1 Thanks: 0  Simple quantitative comparison
OK, I was going thru a very common book for QC, which I find on multiple websites: "501 Quantitative Comparison Questions" One such website is https://www.scribd.com/doc/2744902/5...isonQuestions If you look at question 18 on page 3, it compares ( p squared ) with  (p squared) The and explanation that book gives is as follows: A : Any number squared is positive. Therefore, p squared is positive and  p squared is negative. A positive number is always greater than a negative number. Quantity A is greater ============= I see that they overlooked the fact that p could be 0 in which case both sides will be equal. So it should actually be D (cannot be determined conclusively). Just wondering, how could they miss this important fact or am I missing something (?) Last edited by skipjack; November 27th, 2016 at 07:36 PM. 
November 27th, 2016, 06:10 PM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 2,097 Thanks: 972 
yes, the answer provider forgot to include zero as a possible value for p ... given solutions are not always correct. It happens.
Last edited by skeeter; November 27th, 2016 at 06:13 PM. 

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comparison, quantitative, simple 
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