GMAT Data Proficiency
Unlike the problem solving questions, Data Sufficiency questions do not
require you to solve a problem. Rather, the data sufficiency questions
require you to find whether the statements provide enough information to
solve the question. Many test-takers have difficulty with the Data
Sufficiency questions because they never encounter such questions before
the GMAT. As a matter of fact, when you become familiar with these types
of questions, you will find it easier to solve than the standard problem
The five answer choices after the question do not give five optional
values for you to choose. Instead, they ask for the sufficiency of the
Five answer choices:
(A) if statement (1) alone is sufficient to answer the question, but
statement (2) alone is not;
(B) if statement (2) alone is sufficient to answer the question, but
statement (1) alone is not;
(C) if statements (1) and (2) taken together are sufficient to answer
the question, even though neither statement alone is sufficient;
(D) If either statement alone is sufficient to answer the question;
(E) If statements (1) and (2) taken together are not sufficient to
answer the question.
1. Diagrams accompanying problems agree with information given in the
questions, but may not agree with additional information given in
statements (1) and (2).
2. All numbers used are real numbers.
In each of the problems, a question is followed by two statements
containing certain data. You are to determine whether the data provided
by the statements are sufficient to answer the question. Choose the
correct answer based up on the statement's data, your knowledge of
mathematics, and your familiarity with everyday facts (such as number of
minutes in an hour or cents in a dollar).