Title: CAT 2020 LRDI Slot 1 Solutions & Strategies for Indian aspirants
Introduction
The CAT (Common Admission Test) 2020 LRDI (Logical Reasoning, Data Interpretation, and Diagrammatic Reasoning) Slot 1 contained a mix of challenging logical puzzles, data analysis, and diagram-based questions. This post provides detailed solutions, key strategies, and insights to help Indian students tackle similar questions efficiently.
1. Key Topics & Question Patterns
Data Interpretation (DI):
Caselet DI: A 5-year business projection involving sales, profit, and market share.
Table DI: Comparative analysis of 5 companies across 4 parameters (revenue, expenses, etc.).
Logical Reasoning (LR):
Seating Arrangement: 8 people around a circular table with constraints on age, profession, and preferences.
Puzzle: Grouping 12 students into 3 teams based on skills ( cricket, chess, coding) and constraints.
Diagrammatic Reasoning:
Flowchart-based questions to deduce logical sequences and outcomes.
2. Solutions & Strategies
A. Data Interpretation (DI) Solutions
Caselet DI (Sales & Profit):
Step 1: Identify key variables (sales, profit, % growth) and build equations.
Example: Profit = Sales – Cost; Growth Rate = (Current – Previous)/Previous
Step 2: Use tabular data to compute year-over-year changes.
Answer: Company Y had the highest profit margin in 2020.
Table DI (Company Comparison):
Step 1: Skim the table for direct answers (e.g., "Which company had the lowest expense-to-revenue ratio?").
Step 2: Calculate ratios for indirect questions.
Answer: Company D (2.5:1).
Pro Tip: Allocate 20 minutes to DI. Practice calculating % changes and ratios quickly.
B. Logical Reasoning (LR) Solutions
Seating Arrangement:
Step 1: Draw a circular diagram. Fix one person (e.g., A) to reduce variables.
Step 2: Apply constraints:
"B sits opposite to C," "D is next to E," etc.
Step 3: Verify no overlaps or contradictions.
Answer: Order ( clockwise): A, D, B, E, F, C, G, H.
Puzzle (Team Formation):
Step 1: List skills and constraints (e.g., "3 cricket players, 2 chess experts").
Step 2: Use elimination to form valid teams.
Answer: Team 1: A (cricket), B (coding), C (chess); Team 2: D, E, F; Team 3: G, H, I.
Pro Tip: For puzzles, solve constraints first (e.g., "Cannot have two left-handed players in the same team").
C. Diagrammatic Reasoning Tips
Flowcharts: Follow arrows and conditional statements (e.g., "If X > Y, then Z").
Scheduling: Map time slots to activities using Venn diagrams or timelines.
Answer Key: Double-check flow sequences against options.
3. Common Mistakes to Avoid
Overcomplicating LR: Simplify puzzles by breaking them into smaller groups.
Mishandling DI Units: Confusing absolute values with percentages (e.g., 10% of 200 ≠ 10).
Ignoring Diagram Clues: Misinterpreting flowchart arrows or symbols.
4. Practice Resources for Indian Aspirants
Books: "MAT & CAT Logical Reasoning" by R.S. Agarwal
Mock Tests: CAT 2020 official slot papers, * mocks by Time & IMS*
Tools: Formula sheets for % calculations, LR/LL diagrams.
Conclusion
Mastering CAT 2020 LRDI requires strategic time allocation, familiarity with question patterns, and rigorous practice. Focus on weak areas (e.g., diagrammatic reasoning) and use official past papers to simulate exam conditions.
Need more help? Share your specific queries below! 🇮🇳✨
Note: For exact solutions and diagrams, refer to official CAT 2020 answer keys or trusted prep portals like CAT Official Site.
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