Transcript Data Sufficiency for GMAT/CAT

By Satyadhar Joshi
May 2011
Online Class
http://www.freegregmatclass.com/
[email protected]
Data Sufficiency for
GMAT/CAT
(Introduction Level-0) Energy
Content






Introduction
Questions of Data Sufficiency
Strategies for solving
Some examples
Conclusion
References
About this Class

Tough questions of Data Sufficiency for CAT/GMAT with
some strategies to solve them will be discussed. Modified
question of some books will be solved so that you can
benefit and hone(sharpen) your skills.

This session will help you to understand how to pick up
and visualize, fine tune and strategically work for DS. The
class is expected to be highly interactive so that I can
solve your difficulties and remove your fears about the
subject.
Introduction








Session about Data Sufficiency
Strategy more important than knowledge about the
subject
You don’t have to solve the questions
We have to just conclude if it can be / or cannot be
solved with the given data
The questions are mathematical or logical
Tricks and shortcuts explored
Practice Session
Confidence building measure taken up
Areas of DS






















Substitution
Defined Functions
Number Theory
Geometry
Coordinate Geometry
Inequalities
Fractions & Decimals
Equations
Averages & Statistics
Ratio & Proportion
Exponents & Roots
Factoring
Algebraic Expressions
Percents
Graphs
Word Problems
Sequences & Series
Counting
Probability
Permutations & Combinations
Functions
Miscellaneous Problems
Marking
The correct answer to a question is
A if statement (1) ALONE is sufficient to answer the
question but statement (2) alone is not sufficient;
B if statement (2) ALONE is sufficient to answer the
question but statement (1) alone is not sufficient;
C if the two statements TAKEN TOGETHER are sufficient
to answer the question, but NEITHER statement ALONE
is sufficient;
D if EACH statement ALONE is sufficient to answer the
question;
E if the two statements TAKEN TOGETHER are still NOT
sufficient to answer the question.
Unwarranted Assumptions



How our wrong assumption can cause disaster in the
exam
You must be very careful not to assume any more than
what is explicitly given in a Data Sufficiency problem
Like natural, positive, real etc
Checking Extreme Values

Boundary condition helps us a lot
Degree of Freedom Paradigm


X+y+z=5
In triangles
Page 24, GMAT Data Sufficiency Prep course Nova
Constrains of Examiner

Never will you question sufficient alone
Strategy for Elimination

My personal advice is that go for a sure answer in this
area, or go for very full-proof elimination
Page 418, Book: GMAT Nova Math bible
Strategy & tools


Never solve
Substitution
Very basic Problems
Very basic Problems
Very basic Problems
Very basic Problems
Very basic Problems
Questions Set A

Questions similar with
change data and words
from GMAT Nova Math
Bible
Questions Set B

Questions similar with
change data and words
from GMAT Data
Sufficiency Prep course
Conclusion




Tuff questions dealt in Data Sufficiency
Tricks and shortcuts explored
Practice Session
Confidence building measure taken up
References / Recommended Books



GMAT Nova Math bible
GMAT Data Sufficiency Prep course Nova
Word Translations, 4th Edition (GMAT Strategy Guide,
No. 4)