Try IBM placement papers to understand what type of questions will be asked from this category. Business Communication and Knowledge are very important skills that every candidate is expected to possess.
Take this IBM Numerical Reasoning Mock Series and IBM Placement Papers Numerical Reasoning requires both calculation skills and use of proper logic. Try to answer maximum questions before the time runs out and secure a seat for the next round of IBM Placement.
Try IBM Analytical Reasoning Mock Series and IBM Placement Papers has important questions from number series, letter series and jumbled letters for candidates. These questions can only be solved by regularly practising mock series for IBM Selection Test.