Data sufficiency GMAT practice questions

These 25 GMAT practice questions are for the data sufficiency tutorial.

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Further Questions

• The Official Guide for GMAT Review (11th Edition) available from Amazon or MBA.com, section 6.3 "Data Sufficiency Sample Questions" questions 1-155
• 6 practice questions with explanations from AdmissionsConsultants
• 6 practice questions with explanations from 4GMAT
• Data sufficiency drill from CyberPrep (20 questions, no explanations)