Derangements on GMAT : A Unique case of permutations, explained in 5 minutes!

In this short video, you can learn the concept of derangement from the perspective of GMAT prep or otherwise. See the derangement concept explained in simple language and applied on a bunch of live problems!

Derangements on GMAT

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Infinitives on GMAT
Present Participle on GMAT
Past Participle on GMAT
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Present Participle vs Gerund on GMAT
Comma plus present participle for cause effect relationship
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Exceptions to Parallelism: Case 1 on GMAT
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Exceptions to Parallelism: Case 3 on GMAT
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Use of Which, Who, Whose, Where on GMAT
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“Which” Versus “That” on GMAT
A Rare Case when “That” is Preceded by “Comma” on GMAT
“And” Versus Other Conjunctions on GMAT
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Collective, Countables, Uncountable Nouns on GMAT
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Noun-Pronoun Agreement on GMAT
Pronoun needs a Noun on GMAT
Avoiding Pronoun Ambiguity on GMAT
Exceptions to Pronoun Ambiguity on GMAT
Right “Form” of Pronoun Must be Used on GMAT
“Who” Versus “Whom” on GMAT
A Simple Approach for 12 Different Tenses on GMAT
Simple Tenses on GMAT
Simple Continuous Tenses on GMAT
Present Perfect Tense on GMAT
Present Perfect Continuous Tense on GMAT
Past Perfect Tense – Use of “Had” on GMAT
Use of two “Hads” simultaneously on GMAT
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Perfect Continuous Tenses on GMAT
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Use of “Considered” and “Regarded As” on GMAT
“Because” versus “In That” on GMAT
Use of “So As To” on GMAT
Use of “Modeled” on GMAT
Use of “Native” on GMAT
“Compared with” Versus “Compared to” on GMAT
“Agree with” versus “Agree to” on GMAT
Use of “Distinguish” on GMAT
Use of “Being” on GMAT
Where Versus When on GMAT
There Is and There Are on GMAT
Between Vs Among on GMAT
Usage of “Forbid” on GMAT
SC Meaning Error 1: Incorrect Doer on GMAT
SC Meaning Error 2: Incomplete Meaning on GMAT
SC Meaning Error 3: Incoherent Meaning on GMAT
SC Meaning Error 4: Change in Degree or Surety on GMAT
SC Meaning Error 5: Incorrect Usage of Conjunctions on GMAT
SC Meaning Error 6: Misplaced Keywords on GMAT
SC Meaning Error 7: Omission of Words on GMAT
SC Meaning Error 8: Failing to Convey Cause-Effect Relationship on GMAT
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SC Meaning Error 10: Conveying Different, Parallel Meaning on GMAT
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Properties of a “Sufficient” DS Statement on GMAT
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2 of 5 – Common Mistakes in GMAT Data Sufficiency
3 of 5 – Common Mistakes in GMAT Data Sufficiency
4 of 5 – Common Mistakes in GMAT Data Sufficiency
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Classification of Numbers on GMAT
Some Exceptions on Integers on GMAT
Even and Odd Integers on GMAT
Even and Odd – 3 Amazing DS Examples on GMAT
Finding Units Digit of a Huge Multiplication on GMAT
Finding Last 2 Digits of a Huge Multiplication on GMAT
How to Find Last Digits of Large Powers and Exponents on GMAT
Finding the Number of Factors on GMAT
Finding the Highest Power in a Factorial on GMAT
Terminating Fractions on GMAT
How to Find Remainder for a Huge Product on GMAT
Finding Remainder for a Large Exponent on GMAT
The Most Favorite Remainder Question Type on GMAT
An Important Surds and Indices Question Type on GMAT
Another Important Surds and Indices Question Type on GMAT
Sets – Two Elements on GMAT
Sets – Three Elements on GMAT
A Smart Approach to Percentage Increase and Decrease on GMAT
Taking Base as 100 in Percentage Questions on GMAT
Mixtures – Two Elements on GMAT
Mixtures – Three or More Elements on GMAT
Alligation – When and How to Use on GMAT
Application of Alligation on a Question on GMAT
A Key Concept on Proportion on GMAT
The Concept of “Variation” or “Proportionality” on GMAT
Basics of “Profit and Loss” on GMAT
Basics of “Interest” on GMAT
Arithmetic Mean or Average on GMAT
Mode on GMAT
Median on GMAT
Standard Deviation on GMAT
“Range” and “Variation” on GMAT
Avoid Multiple Variables to Save Time on GMAT
Solving a Quadratic Equation by Factorization on GMAT
Inequations – Based on Modulus on GMAT
Inequations – Based on Factorization on GMAT
Inequations – Based on Signs on GMAT
Inequations – Based on -1 to 1 on GMAT
May be true and Must be true questions on GMAT
Work – When we can Assume Total Work as 1 on GMAT
Work – When Total Work is Defined on GMAT
Work- when negative work is involved on GMAT
Average Speed on GMAT
Relative Speed on GMAT
Angles – Lines on GMAT
Angles – Triangles on GMAT
Angles – Circles on GMAT
Angles – Polygons on GMAT
Basic Properties of Triangles for GMAT
Basic Properties of Quadrilaterals for GMAT
Basic Properties of Isosceles, Equilateral, and Right Triangles on GMAT
Basic Properties of Circles on GMAT
Basic Properties of Congruent and Similar Triangles on GMAT
GMAT’s Favorite Right Triangles
An Interesting Question Type on Triangles for GMAT
Another Important Question Type on Triangles for GMAT
Area of Overlapping Regions I for GMAT
Area of Overlapping Regions II for GMAT
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How to Find “Total Surface” Area of any Solid on GMAT
How to Find the “Volume” of any Solid on GMAT
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Equation of a Line on GMAT
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Slope of a Straight Line on GMAT
Equation of Circle on Coordinate Axis on GMAT
Length of Perpendicular on Coordinate Axis on GMAT
A Basic Approach Towards Counting the Arrangements on GMAT
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Applying the Permutations and Combinations Formula on GMAT
Relationship Between Permutations and Combinations on GMAT
An Explanatory Permutations Example for GMAT
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Circular Arrangements for GMAT
Repetitive Arrangements for GMAT
Distributive Arrangements for GMAT
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Characteristics of a Strengthening Statement on GMAT Critical Reasoning
Characteristics of a Weakening Statement on GMAT Critical Reasoning
Characteristics of an Explanation Statement on GMAT Critical Reasoning
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Characteristics of an Evaluation Statement on GMAT Critical Reasoning
Characteristics of an Inference Statement on GMAT Critical Reasoning
Characteristics of a Conclusion Statement on GMAT Critical Reasoning
Characteristics of a Para-completion Statement on GMAT Critical Reasoning
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Vocabulary Test 2 for Boldface Questions on GMAT Critical Reasoning
Vocabulary Test 3 for Boldface Questions on GMAT Critical Reasoning
Vocabulary Test 4 for Boldface Questions on GMAT Critical Reasoning
Vocabulary Test 5 for Boldface Questions on GMAT Critical Reasoning
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Confusing Cause with Effect on GMAT Critical Reasoning
Confusing Correlation with Causation on GMAT Critical Reasoning
Assuming that bases are same on GMAT Critical Reasoning
Incorrect Analogy on GMAT Critical Reasoning
Generalization on GMAT Critical Reasoning
Circular Reasoning on GMAT Critical Reasoning
Impressed by numbers on GMAT Critical Reasoning
Missing the main point on GMAT Critical Reasoning
Comparing percentage with absolute numbers on GMAT Critical Reasoning
Comparing one with oneself on GMAT Critical Reasoning
Confusing necessity with sufficiency on GMAT Critical Reasoning
Confusing sufficiency with necessity on GMAT Critical Reasoning
Confusing possibility with necessity on GMAT Critical Reasoning
Confusing between subsets and supersets on GMAT Critical Reasoning
Common Errors in AWA Reasoning on GMAT
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Sample Template for AWA Argument on GMAT
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Derangements on GMAT

Derangements on GMAT

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