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Caution about Manhattan Review

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Caution about Manhattan Review [#permalink] New post 24 Nov 2018, 14:44
Hey all, I wasn't quite sure where to post this in the forum, so feel free to move it to wherever the admins deem is appropriate.

I have been taking as many free practice GRE questions that I can to brush up on topics. For the most part, things have been fine and the questions have been appropriate and accurate...up until the Manhattan Review. I have only taken about 25 questions or so on their free section, and 2 of the questions have had wrong answers. I have attached the screenshots of my experience with these discrepancies and have notified the company as well. Hopefully, this is just an honest mistake, however, this is not acceptable for a company to be offering incorrect education and pawning it off as legitimate.

Hopefully this helps someone, but also please let me know if I'm completely incorrect and just a crazy *insert derogatory noun here*. Good luck to you all on your journeys, and remember to make the most of your time because it's all that you really have.

I don't know how kosher this is, but I was asked by Manhattan Review to link the questions here instead of posting my screenshots (citing a copyright violation, and I don't feel like looking it up to protest). The second question, GRE-SMQ-6 was explained as a coding issue (which I can see, but c'mon, fix it. I can't be the first person to say something). The first question will be reworked and posted in a couple days, according to the contact at Manhattan. Fingers crossed!

Question ID: GRE-SMQ-3
Question ID: GRE-SMQ-6

--Andrew Hershey BSN, RN, future CRNA

Last edited by ahershey40 on 25 Nov 2018, 01:15, edited 1 time in total.
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Re: Caution about Manhattan Review [#permalink] New post 24 Nov 2018, 21:16
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Hi..
Firstly on the question on greater than 10 paperback and less than 11 hardback..
So let us see the maximum and minimum.
1) max books..
Let all be of paperback and money be equal to 300, so 300/8=37.5
2) Min books..
Let the max be of hardback and price be closer to 240
So 11*8=88 and remaining will be hardback, so (240-88)/20=152/20=~7.5 =8
Thus 11+8=19

So 19 to 37..
In this context the explanation is wrong as there second portion is almost similar to first and that is why they get 19,20,21 in both cases.

Now onto the second question..
1) atleast one of 40 and one of 60..
Total 50 with average more than 50..SO more of 60..
Let's see min and max that for 40 ones to be added to get it to below 50..
Min... When there is least difference between the two so 26 of 60 and 24 of 40..
If we add two of 40, both will be equal, 26 each, and the average will be midway at 50, but we want it below 50, so add one more of 40.. Thus, min is 2+1=3..
Max... When there is max difference so 1 of 40 and 49 of 60.. can be anything
So 1 and 2 are wrong
_________________

Some useful Theory.
1. Arithmetic and Geometric progressions : https://greprepclub.com/forum/progressions-arithmetic-geometric-and-harmonic-11574.html#p27048
2. Effect of Arithmetic Operations on fraction : https://greprepclub.com/forum/effects-of-arithmetic-operations-on-fractions-11573.html?sid=d570445335a783891cd4d48a17db9825
3. Remainders : https://greprepclub.com/forum/remainders-what-you-should-know-11524.html
4. Number properties : https://greprepclub.com/forum/number-property-all-you-require-11518.html
5. Absolute Modulus and Inequalities : https://greprepclub.com/forum/absolute-modulus-a-better-understanding-11281.html

Re: Caution about Manhattan Review   [#permalink] 24 Nov 2018, 21:16
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