Examples of GRE General Data Interpretation Questions

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Question: In a survey of 190 manufacturing companies, 103 hired operators, 67 hired technicians, and 49 hired both operators and technicians, as illustrated in the Venn diagram below:

gre data interpretation, Venn diagram


How many companies sureveyed hired at least one category of employees: operators and technicians? (a) 130
(b) 121
(c) 49
(d) 67
(e) 93

Answer:
49 companies hired both operators and technicians.
103 - 49 = 54 companies hired operators only.
67 - 49 = 18 companies hired technicians only.
The number of companies sureveyed that hired at least one category of employees is 49 + 54 + 18 = 121.


Question: In which year did the Company A's revenues increase the most from the year before?

gre, data interpretation, graph
(a) 1971
(b) 1972
(c) 1973
(d) 1974
(e) 1977

Answer:
The slope of the line between 1972 and 1973 is higher than all of the other slopes, so the Company A's revenues increased the most from 1972 to 1973.