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We're back with a strategy for the Day 19 of our preparation for the CAT 2024. In this article, we will be discussing strategies for the following topics: Maxima and Minima Questions for CAT, problem-solving questions in maths, Puzzle-solving questions, Logical Reasoning puzzles for CAT exam and questions from CAT previous year papers.
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Maxima Minima CAT Questions are used to find the maximum or minimum possible value of a function.
Because the shape of the graph depends on these values.
Example:
In a polynomial function, the maxima is the highest point and the minima is the lowest point and the graph looks like a parabola.
Depending on the function, there are several ways to find the maximum and minimum value of a function.
Two main methods are:
Graphical method: In the graphical method, we have to plot the polynomial function on a coordinate plane and visually identify the highest and lowest points on the graph.
Algebraic method: In the algebraic method, we use calculus to find the critical points and then determine whether these points are maxima, minima, or neither.
In maxima minima aptitude questions, the function given can be:
Quadratic function
Linear function
Polynomial function etc.
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For such functions, we need to find the maximum or minimum values.
We need to study “local Maxima and Minima ”, “maxima and minima formula”, “absolute maxima and minima”, “Maxima and Minima calculator”, and “global maxima and minima” for more details.
Here are some tips and tricks to solve maxima minima aptitude questions:
If the sum of positive numbers is constant then their product is maximum when all numbers are equal.
Example:
a + b + c = 36, find maximum value of a.b.c
The answer is (36/3)3 = 1728
Arithmetic Mean ≥ Geometric Mean
a + b + c = 11; find Maximum value of a3 × b4 × c5
a + b + c = a/3 + a/3 + a/3 + b/4 + b/4 + b/4 + b/4 + c/5 + c/5 +c/5 + c/5 + c/5 = 11
Now, AM ≥ GM
So, (a/3 + a/3 + a/3 + b/4 + b/4 + b/4 + b/4 + c/5 + c/5 +c/5 + c/5 + c/5)/12 ≥ (a/3 .a/3 .a/3 .b/4 .b/4 .b/4 .b/4 .c/5 .c/5 .c/5 .c/5 .c/5)1/12
⇒ (11/12)12 ≥ (a/3)3 .(b/4)4 . (c/5)5
⇒ a3. b4. c5 ≤ 33 × 44 × 55 × (11/12)12
Trick: To solve Maxima and Minima Questions, we can use the following trick.
Divide 11 in the ratio 3 : 4 : 5
i.e., a = (11/12)3; b = (11/12)4; c = (11/12)5
So, a3. b4. c5 = 33 × 44 × 55 × (11/12)12 (After putting the values of a, b and c)
For a quadratic equation:
If the minimum value is to be found, convert the equation in the form of (a – b)2 + k.
(Minimum value is k)
Example: find the minimum value of a2 + 26 – 4a
a2 + 26 – 4a = (a – 2)2 + 22;
Minimum value is 22
To find the maximum value of a function f(x) can be calculated with the help of a method of derivative.
Step 1: find f’(x) i.e., the first derivative.
Step 2: Put f’(x) = 0, and find values of x for which function is either maximum or minimum.
Let the values of x be x1 and x2.
Step 3: Find f’’(x) i.e., the second derivative.
If f’’(x) > 0 at x = x1 then the function gives minimum value at x = x1.
If f’’(x) < 0 at x = x2 then the function gives the minimum value at x = x2.
These are local maxima and local minima.
Learn the above concepts well and apply them to solve questions.
Learn basic rules of differentiation.
Use the graphical method to visually identify the maxima and minima.
If the problem involves a specific interval, evaluate the polynomial at the endpoints and compare it with critical points within the interval.
Q1. If three sides of a rectangular park have a total length of 400 ft, then the area of the park is maximum when the length (in ft) of its longer side is:
[CAT Exam 2017]
Solution:
Let one side be a and the other side be b.
So, a + 2b = 400
⇒ 2b = 400-a
⇒ b = 400-a/2
Area = ab = a (400-a)/2 = (400a – a2)/2
To find maximum value of (400a – a2); differentiate with respect to a
dA/da = 400 – 2a = 0 (For maxima)
⇒ a = 200
So, b = 100
Therefore, the longer side will be 200 ft for maximum area.
Q2. An elevator has a weight limit of 630 kg. It is carrying a group of people of whom the heaviest weighs 57 kg and the lightest weighs 53 kg. What is the maximum possible number of people in the group?
[CAT exam 2017, TITA]
Solution:
Each person must weigh 53 Kg or more.
So, remaining weight = 630 – 53 – 57 = 520
Therefore, no of remaining persons n ≤ 520/53
So, n ≤ 10 (For maximum value n = 9)
Therefore, total persons in the elevator = 9 + 2 = 11
Q3. If a and b are non-negative real numbers such that a + 2b = 6, then the average of the maximum and minimum possible values of (a + b) is:
[CAT 2022 Slot 2]
3
4
3.5
4.5
Solution:
a + 2b = 6
From the above equation, we can say that the maximum value b can take is 3 and the minimum value b can take is 0.
a + b + b = 6
a + b = 6 - b
a + b is maximum when b is minimum, i.e. b = 0
Maximum value of a + b = 6 - 0 = 6
a + b is minimum when b is maximum, i.e., b = 3
Minimum value of a + b = 6 - 3 = 3
∴ Average = (6 + 3) / 2 = 4.5
Hence, the correct answer is 4.5.
Q4. The minimum possible value of (x2 – 6x + 10) / (3 – x), for x < 3 is:
–½
2
½
–2
Solution:
(x2 – 6x + 10) / (3 – x)
= (x2 – 6x + 9 +1) / (3 – x)
= (x2 – 6x + 9)/ (3 – x) + 1 / (3 – x)
= (x – 3)2 / (3 – x) + 1/ (3 – x)
As, (x – 3)2 = (3 – x)2,
We can write,
(3 – x)2 / (3 – x) + 1/ (3 – x)
= (3 – x) + 1/ (3 – x)
Since x < 3, (3 – x) is positive.
Let k = 3 – x
Since k is positive, the minimum value of k + 1/k = 2
Hence, the correct answer is 2.
Before practising Maxima and Minima Questions for CAT, students must be well-versed with
Function and Graph
Derivatives
Basic arithmetic identities,
CAT Exam: References to Study (Theory)
NCERT Class 12 (Chapter: Functions, Derivative, Maxima and Minima)
Functions and Graph (Arihant Publication)
2IIM CAT Preparation
CAT Exam: References to Practise Maxima and Minima Questions for CAT 2024
R D Sharma
https://bodheeprep.com/maxima-minima
Previous Year's Question Papers
The topic covered for the day and Logical Reasoning puzzles for the CAT exam are given below:
Placing objects or persons in a circular table following a specific rule is a Circular arrangement.
According to a given set of rules or instructions, persons are to be arranged circularly.
Aspirants can also download the following circular arrangement questions for CAT pdf. for further references.
Puzzles Solving Questions of Circular Arrangements involves the concept of Ranking , Blood Relation , Direction Sense etc.
It carries a good weightage in the CAT exam/SNAP and other MBA entrance Exams as seen in previous years.
Problem-solving questions in maths are generally based on:
Facing towards centre
Facing outward the centre
Facing in two different directions.
Knowledge of solving problems enables you:
To identify the unique position of a person in an arrangement.
To identify respective positions of persons.
Relations among the persons/ objects.
In the CAT exam, linear and circular arrangement questions for CAT are very common.
Students can also study “circular arrangement questions pdf” and “Logical Reasoning circular arrangement questions” to know further about this topic.
Based on the information given below, answer the questions: (SNAP)
Ten friends Matt, Sam, Pat, Tom, Sid, Alex, Kat, Jim, Jane and John are having dinner on a rectangular table. Eight face each other along the length of the table while two face each other along the smaller side of the table. Pat is sitting diagonally opposite to Kat, Alex is facing Jim, John is to the right of Jane, Tom is sitting between Sam and Jim, Pat is to the extreme left of Jane who is sitting on the extreme right along the length of the table. Sid is facing Tom and Matt is on the right of Sam.
Q1. Who do you think is sitting in front of each other along the small sides of the table? (CAT exam)
Matt and John
Matt and Sam
Matt and Kat
John and Sam
Answer: A
Q2. Sid is sitting between which of the following two? (CAT exam)
Sam and Kat
Pat and Alex
Alex and Jane
Kat and Jane
Answer: B
Q3. Who is sitting diagonally opposite to each other? (CAT exam)
Sid and Tom
Sam and Jane
Alex and Jim
Jane and Kat
Answer: B
Q4. Who is sitting to the immediate right of Jim (CAT exam)
Sam
Jane
Alex
Tom
Answer: D
Q5. Who is sitting in two places left to Jane? (CAT exam)
Pat
Alex
Sid
Sam
Answer: C
Solution:
Based on the information given above; the following arrangement be formed
For this read every piece of information very carefully and place the persons.
Knowledge of Ranking , Direction Sense and Blood Relation .
Knowledge of Linear Arrangement.
Tips and Tricks for Puzzle Solving Questions of Circular Arrangement
There is no specific formula to solve CAT Circular arrangement questions.
First, find the number of persons in the arrangement. Draw a circle or rectangle (as per the given condition) and mark their positions.
If the persons are facing away from the centre, the left of the persons/ objects will be in the anticlockwise direction and the right of the persons/ objects will be in the clockwise direction.
If the persons are facing towards the centre, the right of the persons/ objects will be in the anticlockwise direction and the left of the persons/ objects will be in the clockwise direction.
Questions on rectangular arrangements are to be solved in the same way.
Remember the information by short notations.
CAT Exam: References to Study Theory (CAT circular arrangement questions)
Verbal and Non-Verbal Reasoning by R S Agrawal
Cetking (YouTube Channel)
MBAP CAT EBook (Concept Theory)
CAT Exam: References to Practise Problem-Solving Questions in Maths
LRDI for CAT and GMAT by Nishit K Sinha. (Advance)
https://cetking.com/circular/
Previous Year's Question Papers
Correct Use of Articles is one of the most significant skills one should be aware of. “The” article is commonly used with an uncountable or countable noun, indefinite or definite noun, and plural or singular noun.
Sentence improvement questions based on articles are important for both the CAT exam and real life.
It is effective in the following ways:
If you want to rack your skills up in the verbal ability domain, then practise for sentence improvement based on Articles that should be a ‘not to be missed’ topic in your life.
Correct use of articles gives precise specifications about the noun.
With the knowledge of articles, one can easily enhance the quality of a sentence.
Adding articles to your sentence can help you to speak fluently.
Students can also practice “sentence improvement questions and answers pdf”, “sentence improvement rules pdf”, and “sentence improvement mcq” to grasp more about this topic.
Direction: Write the correct form of the underlined phrase.
Q1. Union Carbide Corporation (UCC) was asked to build a plant for manufacture of Sevin, a pesticide commonly used throughout Asia.
of manufacturing the Sevin,
As to manufacture of the Sevin,
for the manufacture of Sevin,
None of these
Answer: C
‘the’ should be used before “manufacture”.
Q2. CAT exam candidates are not allowed to use calculators during their examinations, although they are permitted to do so if certain models meet the requirements.
are not allowed using calculator
do not allowed using the calculator
are not allowed to use a calculator
No correction required
Answer: C
‘a’ should be used before the “calculator”.
Q3. After Geeta fought with Seeta, she moved to a second apartment.
had moved to second apartment
moved to the second apartment
had been moved to the second apartment
No correction required
Answer: B
‘the’ should be used before ‘second’.
Q4. The prime necessity, as the Director of ICRIER said, is to neutralise the amount of imports and exports in the country in a non-discriminatory manner.
neutralising amount of the imports and the exports
neutralise the amount of the imports and exports
neutralise the amount of imports and exports
No correction required
Answer: B
‘the’ should be used before “imports and exports”.
Basic Knowledge of Sentence Structure.
Basic Knowledge of the Usage of Articles.
Make sure you pay close attention to words whose first letters are vowels, but when they are pronounced, they have the sound of a consonant or vice versa. This is the case with words like university, an honest person, etc. For more details, you can head over to the Day-6 strategy.
Practice error-based questions daily.
Read newspapers, and listen to Ted Talks so that you will get more clarity about the uses of articles.
CAT Exam: References to Study (Theory)
How to Prepare for Verbal Ability & Reading Comprehension for CAT by Meenakshi Upadhyay and Arun Sharma (9th Edition)
Mastering A, An, The - English Articles Solved by Douglas Porter.
A' and 'The' Explained: A learner's guide to definite and indefinite articles by Seonaid Beckwith.
CAT Exam: References to Study (Practice)
The Article Book: Practice Toward Mastering a, an, and the by Tom Cole.
Oxford Practice Grammar (sixth edition)
engvid.com (Web)
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Minima and maxima refer to the lowest and highest points, respectively, of a function within a given domain.
Global maximum: Global maximum is also called absolute maximum. The highest value of a given polynomial f(x) in the interval [a, b] is called the Absolute maxima.
Global minimum: Global minimum is also called absolute minimum. The lowest value of a given polynomial f(x) in the interval [a, b] is called the Absolute minima.
Some of the common errors include:
Tense error
Subject-verb agreement error
Pronoun reference and agreement error
Idiomatic expressions
Punctuation errors
Mispelt words
Preposition errors
Redundancy and wordiness
Check if the pronoun correctly referred to the antecedent noun and maintained the number and gender forms.
Example:
Each of the students must submit their homework. (Incorrect)
Each of the students must submit his or her homework. (Correct)
In circular arrangements, sitting positions are relative and cyclic with no ending point or starting point.
In linear arrangements, sitting positions have distinct starting and ending points.
Circular arrangements can be rotated without changing the relative positions of elements, making some configurations equivalent.
In linear arrangements, positions cannot be rotated without changing the relative positions.
Clockwise and anticlockwise directions are relative.
Always draw a diagram to visualize better.
Pay close attention to terms like "left," "right," "next to," and "opposite," as they change based on the direction you consider.
Any tattoo on wrist should not cause any problems for your CAT exam. Tattoos have nothing to do with your analytical abilities and qualifications through written examination. Nothing is specified by the exam conducted authorities regarding tattoos that might cause issues. So ,you can go with tattoo.
To know about CAT exam centre entry codes, you can visit career 360 website
To know about this please prefer our college predictor
Hello,
Yes, you can also join IIMs two years after graduation, depending upon the justification in interviews and your performance in entrance exams. If you are not sure about CAT, try those other management exams less hard:
Common Management Admission Test: Easier than CAT; 4-5 months of continuous preparation will suffice.
MAT : Much easier and takes place thrice a year.
SNAP (Symbiosis National Aptitude Test): A bit easier than CAT, apt for Symbiosis Institutes.
Xavier Aptitude Test or XAT : Hence, easier than CAT but the unique decision-making section.
Use exams like CMAT and MAT as a challenge to be competitively prepared. This can be given about 4-5 months, along with a few rounds of mock tests and smart studying.
Hello,
A blurry signature on your CAT admit card may raise concerns, as it could be difficult for authorities to verify your identity. However, if the rest of the admit card details, such as your photograph and personal information, are clear and accurate, it might not cause an immediate issue. It's advisable to ensure that your signature is clear during future document submissions.
But if your signature is still recognizable, even if it's slightly blurry, it should generally not cause a major issue. As long as the exam authorities can identify your signature, they may accept it. However, it's always best to ensure that all details on your admit card are clear to avoid any potential problems during the exam.
To know more about CAT admit card, visit: https://bschool.careers360.com/articles/cat-admit-card
Hope it helps !
If you have a leg fracture and are scheduled to appear for the CAT entrance exam, it’s best to contact the CAT exam conducting authorities directly rather than the local exam center alone. CAT is managed centrally by the Indian Institutes of Management (IIMs), and they have established protocols for handling candidates with medical needs. Informing the CAT exam cell (via their official contact channels) will ensure that your request is processed appropriately and documented centrally.
You should explain your medical situation and, if needed, request specific arrangements, such as additional assistance to navigate the exam center or seating adjustments. While reaching out to the CAT exam cell, you may also inquire if additional documentation, such as a medical certificate, is required to facilitate the arrangements. Additionally, contacting the allotted test center as a secondary step could be beneficial, as the local administrators may also help with on-ground assistance.
For official contact information, refer to the CAT website’s helpdesk or contact page, which will have the latest guidelines for handling such requests. Taking these steps should ensure a smoother exam experience despite your injury.
https://bschool.careers360.com/articles/cat-eligibility-criteria
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