Start from the Reasoning ok likke :
Data Sufficiency Problems.
Blood Relationship Problems.
Input- Output/ Sequential Output Tracing.
Direction Sense Problems.
Statement Assumption/Conclusion/Arguement/Course of Action.
Ordering and Ranking.
and then go to the English topic :-
Fill in the blank (Vocabulary based problems).
Sentence Correction / Spotting error (Tenses, Part of Speech, Active and Passive Voice, Subject Verb Agreement).
Antonyms/Synonyms based problems.
and later on Aptitude