interactive flashcards for gre math

Interactive GRE Math Flashcards

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topic quantitative comparison strategies

arithmetic powers and roots

algebra and equation-solving word problems

geometry integer properties

statistics counting

probability data interpretation

- slide - 4 - 11 - 34 - 50 - 87 - 107 - 130 - 145 - 152 - 161 - 171

TABLE OF CONTENTS



Quantitative Comparison Flashcards

• The first 7-9 questions of each math section will be QC questions

• Allot approximately 1¼ to 1½ minutes per question

• Given Quantity A and Quantity B

• Compare the two quantities and choose:

A if Quantity A is greater

B if Quantity B is greater

C if the two quantities are equal

D the relationship cannot be determined from the information given

(watch the entire video here)

http://www.greenlighttestprep.com/module/gre-quantitative-comparison/video/1095


Do not perform more calculations than are necessary

Compare quantities in parts

area 25

3 25

75

“bigger than”

12

2A B A B

QC Strategy - Approximation Techniques

Quantitative Comparison Flashcards (watch the entire video here)



QC Strategy - Matching Operations

• Add any value to both quantities

• Subtract any value from both quantities

• Multiply both quantities by a positive value

• Divide both quantities by a positive value

Do not multiply or divide both quantities by a variable unless you are certain that

the variable has a positive value

Acceptable operations




QC Strategy - Plugging in Numbers

1 1"Nice" numbers: 0, 1, -1, , - , 10, -10

2 2

Variable(s) in the quantities consider plugging in values

Drawback

Without two contradictory results, you cannot be certain of the correct answer

Benefit

You can quickly narrow the answer choices down to two options

• great for questions where you don’t know how to proceed!




Is there a value for the variable that makes the two quantities equal?

Plugging in numbers?

QC Strategy – Looking for Equality




• Some Quantitative Comparison questions can be solved quickly by applying some number sense

QC Strategy – Number Sense




QC Strategy - Miscellaneous Tips

• Avoid making unnecessary computations

• Do not select D if the comparison does not contain unknown values

• Geometry figures are not necessarily drawn to scale (unless stated otherwise)

• Pay close attention to the shared information




Arithmetic Flashcards (watch the entire video here)

http://www.greenlighttestprep.com/module/gre-arithmetic/video/1057


Powers & Roots Flashcards (watch the entire video here)


http://www.greenlighttestprep.com/module/gre-powers-and-roots/video/1021

Algebra & Equation-Solving Flashcards (watch the entire video here)


http://www.greenlighttestprep.com/module/gre-algebra-and-equation-solving/video/948

Word Problems Flashcards (watch the entire video here)


http://www.greenlighttestprep.com/module/gre-word-problems/video/900

Geometry Flashcards (watch the entire video here)


http://www.greenlighttestprep.com/module/gre-geometry/video/858

Integer Properties Flashcards (watch the entire video here)


http://www.greenlighttestprep.com/module/gre-integer-properties/video/820

Statistics Flashcards (watch the entire video here)


http://www.greenlighttestprep.com/module/gre-statistics/video/800

Features of Normal Distributions

• Data are reasonably symmetrical about the mean

• Mean, median and mode are all nearly equal

• About 68% of the data are within 1 standard deviation of the mean

• About 95% of the data are within 2 standard deviations of the mean

• About 99% of the data are within 3 standard deviations of the mean

• The greater the standard deviation, the wider the curve




1) Rearrange values in ascending order

2) The median of all values is the 2nd quartile (Q2)

3) The median of the “lesser numbers” is the 1st quartile (Q1)

4) The median of the “greater numbers” is the 3rd quartile (Q3)

Least value (L) Greatest value (G)

1st Quartile (Q1)

Median (M)

2nd Quartile (Q2)

3rd Quartile (Q3)

Creating a Boxplot

Exclude Q2 from the lesser and greater numbers




Counting Flashcards (watch the entire video here)


http://www.greenlighttestprep.com/module/gre-counting/video/773

Probability Flashcards (watch the entire video here)


http://www.greenlighttestprep.com/module/gre-probability/video/742

Data Interpretation Flashcards (watch the entire video here)

http://www.greenlighttestprep.com/module/gre-data-interpretation/video/1255



Scatter Plots



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interactive flashcards for gre math

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