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Also, the highly advanced hidden integer questions frequently appear on exams.
(ex 6) Tom, who has 50 math questions, will get 5 points per question if he chooses a correct answer. If he chooses a wrong answer to a question or skips one, he will lose 2 points per question. Then, which of the following can be the score if he solves all the 50 questions?
Also, a question like n!=n(n-1)!=n(n-1)(n-2)! frequently appears on GMAT. Look at the question below. (ex 5)Which of the following is equal to (x+1)!/x!?
A. x-1 B. 1+(1/x) C. 1 D. x+1 E. x
Answer: D
In this question, from (x+1)!/x!=(x+1)x!/x!=x+1, D becomes the answer. You will find this type of question very often.
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Furthermore, highly advanced integer questions are frequently given on GMAT. (ex 6) If it is well known that (1.0001)^100is approximately 1.01 and (1.01)^100 is approximately 2.7, what is the value of ((1.0001)^200)^200 approximately? A. 43 B. 47 C. 53 D. 61 E. 64 Answer: C
In this case, C becomes the answer. However, facing with a question like this without knowing concepts of questions can be very challenging. This type of integer questions is given very often, so you have to be very cautious.
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Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]
Show Tags
23 Apr 2016, 23:38
MathRevolution wrote:
Also, geometry questions are rising continuously. Let's take the recent question as an example.
(ex 4)
Attachment:
yin yang.jpg
There is a yin-yang symbol shown as above figure such that its radius is 2. What is the area of the region shaded? 1) Both arc MNO and arc OCD are the same semi-circles. 2) The area of region shaded is half of the area of the circle
Answer: B
In this case, 1) and 2) are the same, which makes D the answer. Just like the question above, slightly difficult and deriving 1)=2) questions which make D the answer are frequently given as well. This type of geometry questions are steadily on an upward tendency.
Does the answer to this question B or D?
If D please explain option A
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"When you want to succeed as bad as you want to breathe, then you’ll be successful.” - Eric Thomas
How are you able to gather so much detailed information on what questions are being used in live GMAT exams today?
Hi,
The math research institute of Max lee has been continuously surveyed our student after an exam about type of questions, chapter, etc. Based on the survey, we try to figure out what is the recent type of question. Also, in order to find out types of GMAT Math questions, we search related websites of other countries, which enables us to come up with recent type of question.
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Plus, geometry questions are continuously increasing. Let's have a look at the recent question.
Attachment:
triangle.jpg [ 9.33 KiB | Viewed 2558 times ]
If BC=a, AB=x, AC=y, and AD=h, is ∠BAC=90o?
1) xy=ah 2) ∠C=30
Answer: A
In this case, Modify the original condition and the question. In order to satisfy ∠BAC=90. AB should be a base line and AC be a height, at the same time, BC should be a base line and AD should be a height as well. Then, the areas of the triangles should be the same, which is (1/2)xy=(1/2)ah? -> xy=ah?. Hence, the answer is A.
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Plus, geometry questions are consistently increasing. For instance,
Attachment:
attachment.jpg [ 15.62 KiB | Viewed 2503 times ]
A certain rectangle has L and W shown as above figure such that L=2W. If the region has uniformly width d, the area of the region shaded is what percent of the area of the entire region?
1) w=3d 2) w=360
Answer: A
In this case, when one con is ratio and the other con is number, ratio is an answer. For 1), w=3d is ratio, which is sufficient. Hence, the answer is A.
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Do GMAT compulsorily ask Permutation questions. Should i study that topic or not
It is extremely rare that GMAT compulsorily ask permutation questions and you don't have to study permutation separately. All you need to do is to memorise the fomula of nPr as nPr is part of nCr. Thank you.
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Questions involving probability and integers frequently appear as well.
(ex 6) If 5 integers are selected randomly from all the integers between 11 and 30 inclusive, what is the probability that the 5 numbers selected must contain 11 and 13? A. 1/10 B. 3/19 C. 1/17 D. 1/19 E. 1/18 Answer: D
18C3/20C5=1/19. Hence, the correct answer is D.
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A probability question frequently appears in the test.
3 different colors are there. We paint the colors to the region numbered as shown above figure. If adjacent regions are painted by different colors, how many possible ways are there? A. 12 B. 18 C. 24 D. 28 E. 30 Answer: A As adjacent regions are painted by different colors, we get 3*2*1*2=12.
There are many questions related to geometry. Let’s take a look at one example.
A circle with its radius is 30 are surrounded by fence that has 10 as a uniform width, what fraction of the large circle’s area is the fence’s area? A. 1/4 B. 2/5 C. 7/16 D. 9/16 E. 11/16 Answer: C
From above question, [(40^2)π-(30^2π)]/402π=7/16. The answer is C.
This is a probability question. Each digit of 3-digit codes are formed from 0, 2, 4, 5, and 6. Each digit of the codes cannot be repeated. If the codes are divisible by 5, how many possible codes are there? A. 9 B. 12 C. 20 D. 21 E. 24 Answer: D
Since the codes need to be divided by 5, the units digit cannot be 0. Then we got 3*3=9. If the units digit is 0, we get 4*3=12. Then, 9+12=21. The answer is D.
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