Title: 2021 Slot 1 LRDI - Indian Exam Answer Guide (English)
Introduction
The 2021 Slot 1 LRDI section likely refers to a Logical Reasoning, Data Interpretation, and Numerical Ability component of a standardized Indian exam (e.g., CAT, UGC NET). Below is a structured guide to solving LRDI-type problems, with examples and strategies tailored for Indian competitive exams.
1. Logical Reasoning (LR)
Key Topics:
Blood Relations
Seating Arrangements
Puzzles (Alphabetical, Number-based)
Categorization & Grouping
Example Problem:
“Six people (A, B, C, D, E, F) are sitting in a circle. A is between B and F. C is opposite E. D is next to B but not adjacent to F. Who is opposite A?”
Solution:
Visualize the Circle:
Place A between B and F.
Since C is opposite E, and D is next to B but not F, arrange remaining positions.
Final arrangement (clockwise): B-A-F-E-C-D.
Opposite of A: C.
Strategy:
Use clockwise/counter-clockwise labeling.
Mark constraints (e.g., "not adjacent") to eliminate options.
2. Data Interpretation (DI)
Key Topics:
Bar Graphs, Line Graphs
Pie Charts
Caselet Analysis
Example Problem:
“A pie chart shows sales distribution (2021) for 5 products: X (20%), Y (15%), Z (25%), W (30%), V (10%). If total sales = ₹5,00,000, find the ratio of Y to V sales.”
Solution:
Calculate Individual Sales:
Y: 15% of 5,00,000 = ₹75,000
V: 10% of 5,00,000 = ₹50,000
Ratio: 75,000 : 50,000 = 3:2
Strategy:
Convert percentages to fractions.
Simplify ratios using LCM/GCD.
3. Numerical Ability (NA)
Key Topics:
Percentage, Profit/Loss
Algebra (Quadratic Equations)
Time & Work
Example Problem:
“A shopkeeper sells a book at a 20% loss. If he had sold it for ₹120 more, he would have made a 5% profit. Find the cost price.”
Solution:
Let CP = ₹100x.
SP at 20% loss: 80x.
SP + ₹120 = 105x → 80x + 120 = 105x → 25x = 120 → x = ₹4.8.
CP = 100x = ₹480.
Strategy:
Assume CP as 100 for simplicity.
Use algebraic equations to relate SP and CP.
4. General Tips for LRDI
Time Management: Allocate 30-40 minutes for DI (data-heavy) and 20-30 for LR.
Practice Set Analysis: Identify recurring question patterns (e.g., blood relations in LR).
Check Answer Key: Verify solutions to avoid calculation errors.
Conclusion
Mastering LRDI requires strategic practice and understanding exam-specific patterns. For more tailored help, share a specific problem or exam name (e.g., CAT 2021), and I’ll provide a detailed breakdown!
#CAT2021 #LRDI #ExamPrep
Let me know if you need further clarification! 😊
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