hey guys , i have got 3 months to prepare for the test . 15th December is D-day for me . I haven't yet taken a diagnostic test , but have rather started reading Manhattan SC and PowerScore CR . Should I take the diagnostic first , or rather study the material first and then take prep tests ? Does the diagnostic test really help you to know your weaknesses ?
Plus in the quants department inequalities and modulus problems are giving me a tough time

.. please suggest some good books to brush up on these concepts .
Plus 1 more weird doubt , is it true that the level of problems in OG is not upto the mark of the real thing , ie when you reach a level of 700 + , cos im getting some problems wrong on the DS and problem solving section of OG

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