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Rephrase, then test

The trap catalogue

Rephrase the question first

Test cases on purpose

The C or E decision

Before you choose C

Inequalities and squares

Statistics without calculation

Check yourself

Before you try the quizzes

Check: hidden assumption

Check: the repeat statement

Check: two roots

Check: squares and signs

Check: the partial answer

Check: two cases survive

Answers and why

Advanced Unit 10 of the Prepspire GMAT Course: Data Sufficiency traps.

The hard half of Data Sufficiency: hidden assumptions, partial answers, repeated statements, and the C or E decision.

Unit 10: Data Sufficiency Traps

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