OG11 is the 11th edition of the Official Guide.

MGMAT is Manhattan GMAT.

sp19-

Frankly, I did very little studying for verbal. I was already around 80% in that. My main concern was for Quantitative where I was able to improve my score dramatically.

I don't think the answer is exactly any of those listed. I think if B had 2!3!3! in the denominator than it would be correct. On one side you have 3! ways the 3 men can be arranged and on the other side you have 2! ways the 2 men can be arranged. You have 3 more places that can be arranged 3! ways. ...

I just divided 80/3 = 26.66...

So, that's the minimum # of students per aide. Then multiply 26.66 x 5 = 133.3 which is the minimum # of students for 5 aides.

Ian-

Is there a faster way to approach this problem? It doesn't seem like we would be expected to work it out for all the digits. Additionally, just multiplying it out for 9^9 and finding the square root of that would take considerable time. What are the <2 minute approaches?

An easier way to solve this is just plug in a number. If we say x is 10 miles, It would have been 10 min. + 5 min. = total of 15 min. If it had been 60 mph the entire time it would be = total of 10 min. 15 is 50% greater than 10. Now all we have to do is put 10 in for x in each of the options and wh...

Dalwow, it's great to hear that you're scores are improving. If you look at my test scores found in my signature you'll see a mysterious 650 that appeared on an exam surrounded by mid 500 scores. That was an anomaly that I think is similar to your concern, but if you look at my later scores, there ...

Is this MGMAT accurate?

To first give a little background - the first time I took the GMAT I got a 570. At the time I was being ridiculous, and took it without studying. It has been several months and I have taken time to study every day. I purchased the MGMAT practice exams and have been periodically taking those while al...