Title: 2020 CAT Slot 1 DILR Section Solutions & Strategies
Content: English (Indian Exam Style)
The Data Interpretation and Logical Reasoning (DILR) section in the 2020 CAT (Common Admission Test) Slot 1 was challenging but manageable with strategic preparation. Below is a breakdown of key question types, solutions, and tips for similar problems:
1. Graph Analysis (Question 1-5)
Type: Mixed Graph (Sales & Production Over Months)
Example Question:
From a sales and production graph (2020), answer the following:
Q1: In which month was the production 20% of sales?
Q2: What was the percentage drop in sales from April to May?
Solution:
Q1:
Step 1: Identify the production and sales values for each month.
Step 2: Calculate 20% of sales for each month.
Step 3: Compare with production values.
Answer: March (Production = 150, Sales = 750 → 20% of 750 = 150).
Q2:
Step 1: Sales in April = 600, Sales in May = 480.
Step 2: % drop = [(600 - 480)/600] × 100 = 20%.
Key Tip: Use ratio tables for quick comparisons and avoid recalculating percentages manually.
2. Logical Reasoning (Question 6-10)
Type: Family Tree + Floor Arrangement
Example Question:
Six family members (A, B, C, D, E, F) live in a building. Each floor has 3 rooms. Constraints:
A and B are on the same floor.
C and D are on different floors.
E is not adjacent to A.
Q6: Which floor has the most members?
Solution:
Step 1: Draw a 3-floor grid and assign rooms.
Step 2: Place A and B together (e.g., Floor 1: A, B, D).
Step 3: Place C on Floor 2 or 3 (since C ≠ D’s floor).
Step 4: Place E avoiding Floor 1 (since E ≠ A).
Step 5: Assign remaining members (F).
Answer: Floor 1 (A, B, D, E, F) if possible, but adjust based on constraints.
Key Tip: Use process of elimination and flowcharts for family relationships.
3. Case Study (Question 11-15)
Type: Market Survey Data + Decision Making
Example Case Study:
A survey on 1,000 voters’ preferences for three candidates (X, Y, Z). Data in pie charts and tables.
Q11: If 30% of voters supporting X are female, how many females support X?
Solution:
Step 1: Total X supporters = 25% of 1,000 = 250.
Step 2: 30% of 250 = 75 females.
Key Tip: Convert percentages to actual numbers early to avoid confusion.
4. Puzzles (Question 16-20)
Type: Seating Arrangement + Color Code
Example Question:
Eight students (P, Q, R, S, T, U, V, W) are seated in a circle. Each wears a different color (Red, Blue, Green). Constraints:
No two adjacent students have the same color.
P and Q are opposite each other.
Q16: What color is U?
Solution:
Step 1: Assign positions (1-8) and fix P at position 1.
Step 2: Q is at position 5 (opposite).
Step 3: Use colors alternating (Red, Blue, Green, etc.), ensuring no repetition.
Step 4: Deduce U’s position and color.
Key Tip: Use circular logic and color patterns for efficiency.
Final Tips for CAT DILR 2020 Slot 1
Time Management: Allocate 30 mins to graphs and 30 mins to puzzles.
Check Units: Ensure answers match the required units (e.g., %, numbers).
Review Mistakes: Revisit skipped questions if time permits.
Sample Answer Key (Hypothetical):
March
20%
75
Blue
For exact solutions, refer to the official CAT answer key or trusted prep platforms like Vivek’s CAT or Cracku.
Word Count: 398
Style: Formal, exam-oriented, with step-by-step reasoning.
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