GMAT Help - Learn by Concept

Concepts

• GMAT Integrated Reasoning

  • Graphics Interpretation

    • Understanding graphics interpretation

  • Multi-Source Reasoning

    • Understanding multi-source reasoning

  • Table Analysis

    • Understanding table analyses

  • Two-Part Analysis

    • Understanding two-part analyses

• GMAT Quantitative Reasoning

  • Data-Sufficiency Questions

    • Advanced Data Sufficiency

    • Algebra

      • Absolute Value+1 topic

        • DSQ: Understanding absolute value

      • Equations+1 topic

        • DSQ: Solving equations

      • Exponents+1 topic

        • DSQ: Understanding exponents

      • Functions/Series+1 topic

        • DSQ: Understanding functions

      • Inequalities+1 topic

        • DSQ: Solving inequalities

      • Linear Equations, One Unknown+1 topic

        • DSQ: Solving linear equations with one unknown

      • Linear Equations, Two Unknowns+1 topic

        • DSQ: Solving linear equations with two unknowns

      • Simplifying Algebraic Expressions+1 topic

        • DSQ: Simplifying algebraic expressions

      • Solving by Factoring+1 topic

        • DSQ: Understanding factoring

      • Solving Quadratic Equations+1 topic

        • DSQ: Solving quadratic equations

    • Arithmetic

      • Counting Methods+1 topic

        • DSQ: Understanding counting methods

      • Decimals+1 topic

        • DSQ: Understanding decimals

      • Descriptive Statistics+8 topics

        • Arithmetic Mean+1 topic

          • DSQ: Calculating arithmetic mean

        • Median+1 topic

          • DSQ: Calculating median

        • Mode+1 topic

          • DSQ: Calculating mode

        • Range+1 topic

          • DSQ: Calculating range

      • Discrete Probability+1 topic

        • DSQ: Calculating discrete probability

      • Fractions+1 topic

        • DSQ: Understanding fractions

      • Percents+1 topic

        • DSQ: Calculating percents

      • Powers & Roots of Numbers+1 topic

        • DSQ: Understanding powers and roots

      • Properties of Integers+1 topic

        • DSQ: Understanding the properties of integers

      • Ratio & Proportions+1 topic

        • DSQ: Calculating ratio and proportion

      • Real Numbers+1 topic

        • DSQ: Understanding real numbers

      • Sets+1 topic

        • DSQ: Understanding arithmetic sets

    • Avoiding Common Data Sufficiency Traps

    • Geometry

      • Circles+15 topics

        • Chords+1 topic

          • DSQ: Calculating the length of a chord

        • Diameter+2 topics

          • DSQ: Calculating the length of the diameter

          • DSQ: Calculating the ratio of diameter and circumference

        • Radius+3 topics

          • DSQ: Calculating circumference

          • DSQ: Calculating the area of a circle

          • DSQ: Calculating the length of a radius

        • Sectors+5 topics

          • DSQ: Calculating the angle for a percentage of a circle

          • DSQ: Calculating the angle of a sector

          • DSQ: Calculating the area of a sector

          • DSQ: Calculating the length of an arc

          • DSQ: Calculating the percentage of a sector from an angle

      • Coordinate Geometry+34 topics

        • Circles+1 topic

          • DSQ: Calculating the equation of a circle

        • Graphing+8 topics

          • DSQ: Graphing a function

          • DSQ: Graphing a line

          • DSQ: Graphing a logarithm

          • DSQ: Graphing a point

          • DSQ: Graphing a quadratic function

          • DSQ: Graphing an exponential function

          • DSQ: Graphing an ordered pair

          • DSQ: Graphing complex numbers

        • Lines+19 topics

          • Distance Formula+1 topic

            • DSQ: Calculating the length of a line with distance formula

          • Midpoint Formula+2 topics

            • DSQ: Calculating the endpoints of a line segment

            • DSQ: Calculating the midpoint of a line segment

          • Other Lines+3 topics

            • DSQ: Calculating the equation of a line

            • DSQ: Calculating the slope of a line

            • DSQ: Calculating whether point is on a line with an equation

          • Parallel Lines+3 topics

            • DSQ: Calculating the equation of a parallel line

            • DSQ: Calculating the slope of parallel lines

            • DSQ: Calculating whether lines are parallel

          • Perpendicular Lines+3 topics

            • DSQ: Calculating the equation of a perpendicular line

            • DSQ: Calculating the slope of a perpendicular line

            • DSQ: Calculating whether lines are perpendicular

          • Tangent Lines+1 topic

            • DSQ: Calculating the slope of a tangent line

        • x and y intercept+2 topics

          • DSQ: Calculating the equation of a curve

          • DSQ: Calculating x or y intercept

      • Intersecting Angles and Lines+1 topic

        • DSQ: Calculating the angle of an intersection

      • Lines+4 topics

        • DSQ: Calculating an angle of a line

        • DSQ: Calculating whether lines are perpendicular

        • DSQ: Understanding intersecting lines

        • DSQ: Understanding rays

      • Polygons+5 topics

        • DSQ: Calculating an angle in a polygon

        • DSQ: Calculating the area of a polygon

        • DSQ: Calculating the length of a diagonal of a polygon

        • DSQ: Calculating the length of a side of a polygon

        • DSQ: Calculating the perimeter of a polygon

      • Quadrilaterals+18 topics

        • Other Quadrilaterals+6 topics

          • DSQ: Calculating an angle in a quadrilateral

          • DSQ: Calculating the length of the diagonal of a quadrilateral

          • DSQ: Calculating the length of the side of a quadrilateral

          • DSQ: Calculating the perimeter of a quadrilateral

          • DSQ: Calculating whether quadrilaterals are similar

        • Rectangles+5 topics

          • DSQ: Calculating the area of a rectangle

          • DSQ: Calculating the length of the diagonal of a rectangle

          • DSQ: Calculating the length of the side of a rectangle

          • DSQ: Calculating the perimeter of a rectangle

          • DSQ: Calculating whether rectangles are similar

        • Squares+4 topics

          • DSQ: Calculating the area of a square

          • DSQ: Calculating the length of the diagonal of a square

          • DSQ: Calculating the length of the side of a square

          • DSQ: Calculating the perimeter of a square

      • Rectangular Solids & Cylinders+17 topics

        • Cubes+4 topics

          • DSQ: Calculating the diagonal of a cube

          • DSQ: Calculating the length of an edge of a cube

          • DSQ: Calculating the surface area of a cube

          • DSQ: Calculating the volume of a cube

        • Cylinders+2 topics

          • DSQ: Calculating the surface area of a cylinder

          • DSQ: Calculating the volume of a cylinder

        • Prisms+4 topics

          • DSQ: Calculating the diagonal of a prism

          • DSQ: Calculating the length of an edge of a prism

          • DSQ: Calculating the surface area of a prism

          • DSQ: Calculating the volume of a prism

        • Tetrahedrons+3 topics

          • DSQ: Calculating the length of an edge of a tetrahedron

          • DSQ: Calculating the surface area of a tetrahedron

          • DSQ: Calculating the volume of a tetrahedron

      • Triangles+23 topics

        • Acute / Obtuse Triangles+8 topics

          • DSQ: Calculating an angle in an acute / obtuse triangle

          • DSQ: Calculating if two acute / obtuse triangles are similar

          • DSQ: Calculating the area of an acute / obtuse triangle

          • DSQ: Calculating the height of an acute / obtuse triangle

          • DSQ: Calculating the length of the hypotenuse of an acute / obtuse triangle

          • DSQ: Calculating the length of the side of an acute / obtuse triangle

          • DSQ: Calculating the perimeter of an acute / obtuse triangle

          • DSQ: Calculating whether acute / obtuse triangles are congruent

        • Equilateral Triangles+4 topics

          • DSQ: Calculating the area of an equilateral triangle

          • DSQ: Calculating the height of an equilateral triangle

          • DSQ: Calculating the length of the side of an equilateral triangle

          • DSQ: Calculating the perimeter of an equilateral triangle

        • Right Triangles+8 topics

          • DSQ: Calculating an angle in a right triangle

          • DSQ: Calculating the area of a right triangle

          • DSQ: Calculating the height of a right triangle

          • DSQ: Calculating the length of the hypotenuse of a right triangle : Pythagorean Theorem

          • DSQ: Calculating the length of the side of a right triangle

          • DSQ: Calculating the perimeter of a right triangle

          • DSQ: Calculating whether right triangles are congruent

          • DSQ: Calculating whether right triangles are similar

    • Specific Value Data Sufficiency

    • Word Problems

      • Data Interpretation+4 topics

        • Diagrams+1 topic

          • DSQ: Understanding diagrams

        • Probability+1 topic

          • DSQ: Calculating probability

      • Discount+1 topic

        • DSQ: Calculating discounts

      • Interest Problems+2 topics

        • DSQ: Calculating compound interest

        • DSQ: Calculating simple interest

      • Measurement Problems+1 topic

        • DSQ: Understanding measurement

      • Mixture Problems+1 topic

        • DSQ: Understanding mixture problems

      • Profit+1 topic

        • DSQ: Calculating profit

      • Rate Problems+1 topic

        • DSQ: Calculating rate

      • Sets+1 topic

        • DSQ: Understanding sets

      • Work Problems+1 topic

        • DSQ: Understanding work problems

    • Yes/No Data Sufficiency

  • Problem-Solving Questions

    • Algebra

      • Absolute Value+1 topic

        • Understanding absolute value

      • Equations+1 topic

        • Solving equations

      • Exponents+1 topic

        • Understanding exponents

      • Functions/Series+1 topic

        • Understanding functions

      • Inequalities+1 topic

        • Solving inequalities

      • Linear Equations, One Unknown+1 topic

        • Solving linear equations with one unknown

      • Linear Equations, Two Unknowns+1 topic

        • Solving linear equations with two unknowns

      • Simplifying Algebraic Expressions+1 topic

        • Simplifying algebraic expressions

      • Solving by Factoring+1 topic

        • Understanding factoring

      • Solving Quadratic Equations+1 topic

        • Solving quadratic equations

    • Arithmetic

      • Counting Methods+1 topic

        • Understanding counting methods

      • Decimals+1 topic

        • Understanding decimals

      • Descriptive Statistics+8 topics

        • Arithmetic Mean+1 topic

          • Calculating arithmetic mean

        • Median+1 topic

          • Calculating median

        • Mode+1 topic

          • Calculating mode

        • Range+1 topic

          • Calculating range

      • Discrete Probability+1 topic

        • Calculating discrete probability

      • Fractions+1 topic

        • Understanding fractions

      • Percents+1 topic

        • Calculating percents

      • Powers & Roots of Numbers+1 topic

        • Understanding powers and roots

      • Properties of Integers+1 topic

        • Understanding the properties of integers

      • Ratio & Proportions+1 topic

        • Calculating ratio and proportion

      • Real Numbers+1 topic

        • Understanding real numbers

      • Sets+1 topic

        • Understanding arithmetic sets

    • Geometry

      • Circles+15 topics

        • Chords+1 topic

          • Calculating the length of a chord

        • Diameter+2 topics

          • Calculating the length of the diameter

          • Calculating the ratio of diameter and circumference

        • Radius+3 topics

          • Calculating circumference

          • Calculating the area of a circle

          • Calculating the length of a radius

        • Sectors+5 topics

          • Calculating the angle for a percentage of a circle

          • Calculating the angle of a sector

          • Calculating the area of a sector

          • Calculating the length of an arc

          • Calculating the percentage of a sector from an angle

      • Coordinate Geometry+37 topics

        • Circles+1 topic

          • Calculating the equation of a circle

        • Graphing+10 topics

          • Graphing a function

          • Graphing a line

          • Graphing a logarithm

          • Graphing a point

          • Graphing a quadratic function

          • Graphing a two-step inequality

          • Graphing an exponential function

          • Graphing an ordered pair

          • Graphing complex numbers

          • Graphing inverse variation

        • Lines+20 topics

          • Distance Formula+1 topic

            • Calculating the length of a line with distance formula

          • Midpoint Formula+2 topics

            • Calculating the endpoints of a line segment

            • Calculating the midpoint of a line segment

          • Other Lines+3 topics

            • Calculating the equation of a line

            • Calculating the slope of a line

            • Calculating whether point is on a line with an equation

          • Parallel Lines+3 topics

            • Calculating the equation of a parallel line

            • Calculating the slope of parallel lines

            • Calculating whether lines are parallel

          • Perpendicular Lines+3 topics

            • Calculating the equation of a perpendicular line

            • Calculating the slope of a perpendicular line

            • Calculating whether lines are perpendicular

          • Tangent Lines+2 topics

            • Calculating the equation of a tangent line

            • Calculating the slope of a tangent line

        • x and y intercept+2 topics

          • Calculating the equation of a curve

          • Calculating x or y intercept

      • Lines+4 topics

        • Calculating an angle of a line

        • Calculating whether lines are perpendicular

        • Understanding intersecting lines

        • Understanding rays

      • Polygons+5 topics

        • Calculating an angle in a polygon

        • Calculating the area of a polygon

        • Calculating the length of a diagonal of a polygon

        • Calculating the length of a side of a polygon

        • Calculating the perimeter of a polygon

      • Quadrilaterals+18 topics

        • Other Quadrilaterals+6 topics

          • Calculating an angle in a quadrilateral

          • Calculating the area of a quadrilateral

          • Calculating the length of the diagonal of a quadrilateral

          • Calculating the length of the side of a quadrilateral

          • Calculating the perimeter of a quadrilateral

          • Calculating whether quadrilaterals are similar

        • Rectangles+5 topics

          • Calculating the area of a rectangle

          • Calculating the length of the diagonal of a rectangle

          • Calculating the length of the side of a rectangle

          • Calculating the perimeter of a rectangle

          • Calculating whether rectangles are similar

        • Squares+4 topics

          • Calculating the area of a square

          • Calculating the length of the diagonal of a square

          • Calculating the length of the side of a square

          • Calculating the perimeter of a square

      • Rectangular Solids & Cylinders+17 topics

        • Cubes+4 topics

          • Calculating the diagonal of a cube

          • Calculating the length of an edge of a cube

          • Calculating the surface area of a cube

          • Calculating the volume of a cube

        • Cylinders+2 topics

          • Calculating the surface area of a cylinder

          • Calculating the volume of a cylinder

        • Prisms+4 topics

          • Calculating the diagonal of a prism

          • Calculating the length of an edge of a prism

          • Calculating the surface area of a prism

          • Calculating the volume of a prism

        • Tetrahedrons+3 topics

          • Calculating the length of an edge of a tetrahedron

          • Calculating the surface area of a tetrahedron

          • Calculating the volume of a tetrahedron

      • Triangles+23 topics

        • Acute / Obtuse Triangles+8 topics

          • Calculating an angle in an acute / obtuse triangle

          • Calculating if two acute / obtuse triangles are similar

          • Calculating the area of an acute / obtuse triangle

          • Calculating the height of an acute / obtuse triangle

          • Calculating the length of the hypotenuse of an acute / obtuse triangle

          • Calculating the length of the side of an acute / obtuse triangle

          • Calculating the perimeter of an acute / obtuse triangle

          • Calculating whether acute / obtuse triangles are congruent

        • Equilateral Triangles+4 topics

          • Calculating the area of an equilateral triangle

          • Calculating the height of an equilateral triangle

          • Calculating the length of the side of an equilateral triangle

          • Calculating the perimeter of an equilateral triangle

        • Right Triangles+8 topics

          • Calculating an angle in a right triangle

          • Calculating the area of a right triangle

          • Calculating the height of a right triangle

          • Calculating the length of the hypotenuse of a right triangle : Pythagorean Theorem

          • Calculating the length of the side of a right triangle

          • Calculating the perimeter of a right triangle

          • Calculating whether right triangles are congruent

          • Calculating whether right triangles are similar

    • Word Problems

      • Data Interpretation+4 topics

        • Diagrams+1 topic

          • Understanding diagrams

        • Probability+1 topic

          • Calculating probability

      • Discount+1 topic

        • Calculating discounts

      • Interest Problems+2 topics

        • Calculating compound interest

        • Calculating simple interest

      • Measurement Problems+1 topic

        • Understanding measurement

      • Mixture Problems+1 topic

        • Understanding mixture problems

      • Profit+1 topic

        • Calculating profit

      • Rate Problems+1 topic

        • Calculating rate

      • Sets+1 topic

        • Understanding sets

      • Work Problems+1 topic

        • Understanding work problems

• GMAT Verbal

  • Critical Reasoning

    • Identifying Assumptions

    • Identifying Causal Flaws

    • Identifying Flaws of Analogy

    • Identifying Flaws of Sampling

    • Identifying Premises

    • Inference Critical Reasoning

      • Advanced Inference Logic

      • Standard Inference Logic

    • Method of Reasoning

      • Advanced Boldface Reasoning

      • Method of Reasoning

      • Understanding Boldface Reasoning

    • Strengthen/Weaken Critical Reasoning

      • Common Logical Fallacies

      • Identifying Wording Gaps

      • Plan/Strategy Questions

      • Strengthen/Weaken

      • Useful to Evaluate Questions

  • Reading Comprehension

    • Business Passages

      • Extrapolating from the Text in Business Passages+1 topic

        • Making Inferences in Business Passages

      • Understanding Style, Argument, and Organization in Business Passages+2 topics

        • Analyzing Argumentative Claims, Bias, and Support in Business Passages

        • Analyzing Sequence, Organization, and Structure in Business Passages

      • Understanding the Content of Business Passages+2 topics

        • Analyzing Meaning, Purpose, and Effect of Specified Text in Business Passages

        • Understanding Main Ideas in Business Passages

    • Humanities Passages

      • Extrapolating from the Text in Humanities Passages+3 topics

        • Comparing and Contrasting Ideas in and Aspects of Humanities Passages

        • Considering Analogous Concepts in Humanities Passages

        • Making Inferences in Humanities Passages

      • Understanding Style, Argument, and Organization in Humanities Passages+3 topics

        • Analyzing Argumentative Claims, Bias, and Support in Humanities Passages

        • Analyzing Sequence, Organization, and Structure in Humanities Passages

        • Analyzing Style, Tone, Audience, and Point of View in Humanities Passages

      • Understanding the Content of Humanities Passages+4 topics

        • Analyzing Meaning, Purpose, and Effect of Specified Text in Humanities Passages

        • Recognizing and Analyzing Supporting Ideas and Details in Humanities Passages

        • Understanding Main Ideas in Humanities Passages

        • Understanding the Thesis in Humanities Passages

    • Mixed Passages

      • Extrapolating from the Text in Mixed Passages+2 topics

        • Analyzing Cause and Effect in Mixed Passages

        • Making Inferences in Mixed Passages

      • Understanding Style, Argument, and Organization in Mixed Passages+3 topics

        • Analyzing Argumentative Claims, Bias, and Support in Mixed Passages

        • Analyzing Sequence, Organization, and Structure in Mixed Passages

        • Analyzing Style, Tone, Audience, and Point of View in Mixed Passages

      • Understanding the Content of Mixed Passages+3 topics

        • Analyzing Meaning, Purpose, and Effect of Specified Text in Mixed Passages

        • Recognizing and Analyzing Supporting Ideas and Details in Mixed Passages

        • Understanding Main Ideas in Mixed Passages

    • Natural Science Passages

      • Extrapolating from the Text in Natural Science Passages+4 topics

        • Analyzing Cause and Effect in Natural Science Passages

        • Comparing and Contrasting Ideas in and Aspects of Natural Science Passages

        • Considering Analogous Concepts in Natural Science Passages

        • Making Inferences in Natural Science Passages

      • Understanding Style, Argument, and Organization in Natural Science Passages+3 topics

        • Analyzing Argumentative Claims, Bias, and Support in Natural Science Passages

        • Analyzing Sequence, Organization, and Structure in Natural Science Passages

        • Analyzing Style, Tone, Audience, and Point of View in Natural Science Passages

      • Understanding the Content of Natural Science Passages+3 topics

        • Analyzing Meaning, Purpose, and Effect of Specified Text in Natural Science Passages

        • Recognizing and Analyzing Supporting Ideas and Details in Natural Science Passages

        • Understanding Main Ideas in Natural Science Passages

    • Social Science Passages

      • Extrapolating from the Text in Social Science Passages+3 topics

        • Analyzing Cause and Effect in Social Science Passages

        • Comparing and Contrasting Ideas in and Aspects of Social Science Passages

        • Making Inferences in Social Science Passages

      • Understanding Style, Argument, and Organization in Social Science Passages+3 topics

        • Analyzing Argumentative Claims, Bias, and Support in Social Science Passages

        • Analyzing Sequence, Organization, and Structure in Social Science Passages

        • Analyzing Style, Tone, Audience, and Point of View in Social Science Passages

      • Understanding the Content of Social Science Passages+4 topics

        • Analyzing Meaning, Purpose, and Effect of Specified Text in Social Science Passages

        • Recognizing and Analyzing Supporting Ideas and Details in Social Science Passages

        • Understanding Main Ideas in Social Science Passages

        • Understanding the Thesis in Social Science Passages

    • Specific Questions Featuring the Except Structure

  • Sentence Correction

    • Correcting Other Errors and Recognizing Correct Sentences

      • Correcting Other Errors

      • Recognizing Sentences That Contain No Errors

    • Correcting Phrase, Clause, and Sentence Errors

      • Correcting Appositive and Interrupting Phrase Errors+2 topics

        • Correcting Appositive Errors

        • Correcting Interrupting Phrase Errors

      • Correcting Conjunction Errors+3 topics

        • Correcting Correlative Conjunction Errors

        • Correcting Other Conjunction Errors

        • Correcting Subordinating Conjunction Errors

      • Correcting Modifier Placement Errors+3 topics

        • Correcting Ambiguous Modifier Errors

        • Correcting Dangling Modifier Errors

        • Correcting Misplaced or Interrupting Modifier Errors

      • Correcting Other Phrase, Clause, and Sentence Errors+3 topics

        • Correcting Other Phrase, Clause, and Sentence Errors

        • Correcting Parallel Structure Errors

        • Correcting Sentence Fragment and Sentence Combination Errors

    • Correcting Punctuation Errors

      • Correcting Apostrophe Errors

      • Correcting Colon Errors

      • Correcting Comma Errors

      • Correcting Other Punctuation Errors

      • Correcting Quotation Mark Errors

      • Correcting Semicolon Errors

    • Correcting Word Usage Errors

      • Correcting Agreement Errors+4 topics

        • Correcting Modifier-Word Modified Agreement Errors

        • Correcting Noun-Noun Agreement Errors

        • Correcting Pronoun-Antecedent Agreement Errors

        • Correcting Subject-Verb Agreement Errors

      • Correcting Usage Errors+17 topics

        • Correcting Adjective and Adverb Errors+2 topics

          • Correcting Comparative and Superlative Errors

          • Correcting Other Adjective and Adverb Errors

        • Correcting Other Usage Errors+3 topics

          • Correcting Conventional and Idiomatic Usage Errors

          • Correcting Errors Involving Commonly Confused Words

          • Correcting Preposition Errors

        • Correcting Pronoun Errors+4 topics

          • Correcting Pronoun Errors: Ambiguity

          • Correcting Pronoun Errors: Case

          • Correcting Pronoun Errors: Inconsistent Usage

          • Correcting Pronoun Errors: Incorrect Usage

        • Correcting Verb Errors+4 topics

          • Correcting Other Verb Errors

          • Correcting Verb Mood Errors

          • Correcting Verb Tense Errors

          • Correcting Verb Voice Errors

    • Meaning

      • Illogical Predication

      • Logical Meaning