Rastk,
I got this info's for u i hope it'll be of use.
all d best
it will be about 5 sections combining test of english, basic maths, sentence completion, logical reasoning and verbal aptitude. yes it will take about 1 hr for the 100 questions,
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read your GMAT very well is GMAT all tru and their question is too volumenous. infact is a booklet. more dan 100 tough question in 1 hr.