how should i increase my score in LR??? 

Hai Srishti, Logical Reasoning is one of the important sections in CAT. It is clubbed with Data Interpretation. A total of 8sets or 32 questions will be tested in this section. Mostly questions will be coming from Arrangements, Games & Tournaments, Puzzles, Set Theory, Venn Diagrams, Network Diagrams, etc. First, you need to have a basic idea of all these areas and then you need to practise extensively. Along with them, you can practise Sudoku puzzles etc. Remember the key in this section is practice and getting exposed to wide variety of sets.