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(1)Chapter 8 (Data Suff. Strategy) GMAT
In a Yes/No data suff. problem, YES is a sufficient answer and NO is a sufficient answer, MAYBE ...
is not a sufficient answer
Never turn a Yes/No question in to a Value question
Testing smart numbers:
try fractions, negatives and zero unless SPECIFICALLY told not to by constraints
In data sufficiency, two statements cannot...
contradict each other