Hi Guys
Just came back from my second attempt at GMAT! Thought I'd write a very quick post on the four tips that I found made the biggest improvement in my quant score with the least effort:
Like many other posters here, my first attempt returned a decent overall score, but very unbalanced with very high verbal score (97th percentile) and a somewhat middling quant, so the focus this time out was to improve the quant. I managed to get my score up from 66th percentile - a little low for my purposes, to 78th percentile - enough to move my score from being marginally too low to better than I actually need for the school that I want.
So here's the four tips that made the biggest improvement for the least effort.
1.
If you're struggling, guess and move on: If there's just one take away from this post, this is it.
The first time I took the test I really hadn't realised just how critical this is. Unless you really focus on time management it's incredibly easy to spend 4 or even 6 minutes on a question. Once I started doing the mock tests I realised that every time I did this, I not only totally screwed over my chances on subsequent questions, but most of the time I still ended up getting that question wrong anyway! I was actually burning way more time on questions I got wrong than I was on questions I got right! The GMAT is unlike any test that you've ever done in that you can get half the questions wrong and still get a pretty decent score. If you get to 3 minutes and you don't have an answer yet, guess and move on. My finding was that this
alone boosted my quant score quite noticeably. By the way, I used the Manhattan online mock tests which I do highly recommended - all their textbooks come with 6 online mock exams that provide a wealth of really good data analysis reports into where your weaknesses are, where you're losing time etc.
2.
Read the question: Obvious huh? But I can't count the number of times I screwed up during prep simply because I was in too much of a rush to start answering the question and didn't actually read it properly. The problem is, when you rush past the question, you all too often miss that little detail that makes the difference between getting it right and failing miserably after wasting 5 minutes. Force yourself to spend a full 30 seconds reading the question, and glance at the answer options before you start writing. It really helps.
3.
How to make up time: One of the posts on this forum on time mgmt that I came across points out that the GMAT algorithm penalises *consecutive* wrong answers much more heavily. I can't be certain that this is true of the real thing, but it's certainly noticeably true of the Manhattan mocks which supposedly recreate the GMAT algorithm. If you're running behind and need to make up time, try to guess on every *second* question, and answer the ones in between more carefully. Getting every second one wrong appears to burn your score much less than getting four in a row right and then getting the next four in a row wrong because you've run out of time.
4.
A quick way to solve those pesky factorial questions: A much less important tip, but still in the category of very small effort for a good return was a gem I came across in the excellent post from Bunuel on number theory. (I'd link to it, but the forum rules won't let me, just do a search on the forum for "Bunuel number theory", it should be the top post)
This post contains lots of good stuff, but for me the hidden gem was the formula towards the bottom for how to very quickly determine the number of instances of a given prime number in a factorial. This is one of the very few things I noticed that seems to come up in the GMAT
all the time but which Manhattan really doesn't cover very well. Manhattan does vaguely cover it in passing and gives you some idea how to figure it out from first principles. Bunuel gives you a fool-proof formula that a 10 year old could work. I know which one I prefer!
So there you go. I reckon that at least half my score improvement basically comes down to these four tips. Hope it helps! Good luck folks!