you need to have a gud background on numerical ability coupled wid verbal and general studies.You can watch career study videos on u tube to aid nd ace ur prep.
only one suggestion just try to attempt minimum 65 question from 100 and all should be correct .after that if u think u can do some more correctly dn go for it and practice the nonverbal reasoning bcoz u will get straight 20 to 25 marks from their all d best