Result correlation between GMAT and GMAT Club's Tests

I ought to say Challenges are great!
And, IMO, very similar to nowadays GMAT quant section.

My results (percentiles):

m01 99.1%
m02 94.5%
m03 100%
m04 96.0%
m05 100%
m06 100%

Real GMAT q49. Screwed up a bit...

Real GMAT 50

Test Correct Total % Correct Mean time msec Percentile
m01 32 37 86.5% 1m 55s 11505 96.3%
m02 34 37 91.9% 1m 35s 9535 97.8%
m03 32 37 86.5% 1m 55s 11588 92.5%
m04 33 37 89.2% 1m 48s 10845 98.7%
m05 31 37 83.8% 1m 59s 11988 94.7%
m06 31 36 86.1% 1m 59s 11990 93.1%
m07 31 37 83.8% 1m 45s 10524 90.5%
m08 28 37 75.7% 1m 49s 10933 86.4%
m09 29 37 78.4% 1m 20s 8033 92.6%
m10 31 37 83.8% 1m 43s 10353 94.6%
m11 30 37 81.1% 1m 25s 8551 83.3%
m12 32 37 86.5% 1m 46s 10688 93.3%
m13 31 37 83.8% 1m 38s 9872 92.0%
m14 33 37 89.2% 1m 38s 9811 100.0%
m23 36 37 97.3% 1m 40s 10081 100.0%
m24 31 37 83.8% 1m 22s 8249 93.3%

Test--Correct--Total--% Correct--Percentile
m01 29 37 78.4% 84.3%
m02 36 37 97.3% 100.0%
m03 34 37 91.9% 97.0%
m04 29 37 78.4% 77.6%
m05 31 37 83.8% 94.7%
m06 29 36 80.6% 89.7%
m07 31 37 83.8% 90.5%
m08 28 37 75.7% 86.4%

Real GMAT q50

I trial m25 and finish with

correctly 30 out of 37 questions; percentile on test m25 is 73.9%
Total time 1h 12m 28s
anyhow, I took the real gmat two month ago and got Q= 48

I think that m25 is much easier than the real test as well as mgmat Right?
Is m25 easier than other sets?? (I am deciding to buy other sets)

Thanks

I bought the entire set on an impulse and boy am I glad I did!
Wao...when you guys talk about percentile, are you referring to the percentile the screen gives you at the end of each test?
So far, I have taken 3 tests.
m01 - 29/37 (84.3%)
m02 - 27/37 (47.3%)
m25 - 23/37 (43.5%)

As you can see, my numbers dont even compare to what I see posted here..
Should I go back to basics and not try to take these tests at the time?
I thought I had a pretty good grasp on the concepts as I am an engineering major and have traditionally been decent at math.

These percentiles reflect your position relative to others who have taken that particular test (for instance, not a lot of people have taken m25, perhaps only those who completed a majority of the others, leaving you at a disadvantage and hence skewing your test result. Your results from m01, which has been taken by a lot of people, are perhaps more reflective of where you stand). From the tests you've taken so far, identify your weaknesses, revise them in detail and try to see if you can re-solve the same questions you got wrong previously. Overall, to best utilize these tests, I would encourage you to brush up on all concepts listed in OG11 - and since you're from an engineering background, I suppose it will not take you long to come upto speed.

In general I think these tests are a good tool. Not great. But good. I will give them a hearty recommendation if you have exhausted your OG and Oficial Quantitative Reviews and are looking for alternate materials. Of what I have seen, this is second best.

My complaints are that the questions are often stupid tricky, uninterpretable or unnecessarily complex. In addition, the explanations are suspect at best.

My first concern is that the questions are often unbearably tricky. Sometimes to the point of being unrealistic. They will test your ability to remember that zero is an even number or something ridiculous like that. That being said. You will not make the same mistake twice. Which has to count for something. If you do a couple of these you will immediately know what I mean.

A further complaint is that some of the questions are so grammatically incorrect or poorly written that it is possible to get the question wrong just because you dont understand what is being asked. The one where you have to measure the fish is a good example. The one with the swimmer and the currents is perfect example of a poorly written question because it is possible the current is faster than the swimmer can swim and the swimmer would never reach their destination. Not all the possibilities are considered by the question makers.

I also feel these questions are unnecessarily complex. In the official GMAT questions, fractions seem to have a way of working out. Where as in the challenges it always seems I have to multiply a somewhat unreasonable 23/110 by 7/62 or something of this nature. And it is not that I am doing the question incorrectly, the explanation (which is often lacking at best) tells me I am on the right path. Instead of testing my ability on a concept they test me on multiplication. Blah.

Its almost like whoever wrote these questions took the same concepts that were available and just raised the level of technical difficulty instead of the level of conceptual difficulty. My opinion is that the GMAT is more likely to test your ability to understand and integrate concepts rather than your ability to multiple and divide by obnoxious numbers.

In all, I would estimate that about 20% of the questions are really good, strong, thoughtful questions that are representative of what you would find on the GMAT Prep software. The other 80% fall into a category such as grammatically unsound/not interpretable, trick questions or unnecessarily technical.

That being said, I would still recommend these. They do teach you to look for tricks. They do force you to preform long division and multiplication of fractions by hand. And those 20% of good questions are challenging. Most importantly, they time you and put some pressure on. That all adds up to a worthwhile expenditure as long as you have exhausted your official materials first.

On a side note, is it possible that these percentile rankings are no longer valid? Is it possible that the same person has written the exam multiple times, done really well on their subsequent attempts and is therefore skewing all the results downward?

If I took my average over the first 8 of these that I have completed it would be somewhere around the 50th percentile. Which is a Q36ish. When I took the GMAT Prep 1 exam prior to the GMATclub challenges I scored a Q48 which is like 85th percentile. I will be interested to see what my Q score is on GMATPrep2 and the actual exam to see if these challenges do indeed have a positive impact and do actually reflect my abilities.

Nobody should use GMAT Club Tests percentile as a predictor of real GMAT math percentile. Our Tests just give the percentiles that show your position relative to other test takers. Some people get even 100th percentile if they score very high in not very popular tests that were taken by few people.

Our percentiles are not representative of the real GMAT math percentiles.

"Our Tests just give the percentiles that show your position relative to other test takers"

Isnt that what the GMAT does? I know what you are trying to say. But to me, I would like a tool that gives an accurate representation of my current standing. I have scored as low as 27th percentile and as high as the 80th with the challenges. Maybe you can limit it so that everyone can only submit marks once and that questions submitted in review mode don't count? The way I see things, someone could go through in review mode, submit every answer after being shown the correct one and their score would count in the rankings. How am I supposed to compare myself to that? If you don't make some alterations the percentile ranking is basically worthless.

The only thing I was using it for was to monitor my own progress. But as you have said not everyone writes the same amount of tests so it is basically meaningless against that data too! Oh well. The questions are still a decent buy!

ps. I just realized the original post probably should have been over in the other forum. I put it there as well.

We're working on percentile feature improvement. Thanks a lot for the suggestions!

Hi All
Would have loved to know what Raw Score these Q49-50 Calibre guys used to get/getting in these GMAT Club tests?

Is it like 31-33 Correct (Qs) out of Maxm 37?

I got Q48 easily in GMAT(last Aug) but my scores here in Q01-Q03 are like 12-15 Mistakes(25/37)
Tests are excellent no doubt about that
They will surely teach you many tricks and also let you perform in timed condition
thanks GMAT Club Team

I'm not 100% sure I understand your question. Majority of scores submitted in this thread have raw scores as well. See this one for example:
p512851-result-correlation-between-gmat-and-gmat-club-s-tests#p512851

The first column is the test number, the second - questions answered correctly, the third - total number of questions, ...

I'm sorry if I didn't get your questions right.

Yes ..got my reply in the l(I overlooked earlier)

I need to score atleast 31/37 to aspire for Q50

I just took the m04 and got 27/37..so its improving

thanks to these tests I am cutting down my "common mistakes"

There is no way these test could give a valid percentile because:
1. The percentile is calculated over all the people who take these tests. These people (us) are not representative of the people who take the real GMAT because most of us are determined to get a good GMAT score (that's why we are in gmatclub.com). That should mean that our scores are better that the average GMAT taker and the percentiles are lower.
2. The tests allows to "cheat" by getting into review mode.

Anyway, these tests are very good... just ignore the percentiles.

i am taking gmat on 18th july... thanks for the insight

Good luck to you. Hope to receive insights from your experience.

his is my score

Test Correct Total % Correct Mean time Percentile
m01 23 37 62% 66.6903 sec 28%

Could you tell me where do I stand?

28% is way too low. Could someone throw light on this?