Here’s a structured English solution guide for CAT 2019 DILR Slot 2, focusing on common Data Interpretation and Logical Reasoning (DILR) question patterns from that year. While I can’t replicate the exact dataset, I’ll outline typical approaches for DILR sections like Blood Relations, Seating Arrangements, Puzzles, and Data Analysis based on historical trends.
1. Blood Relations (Common in CAT DILR)
Sample Question Type:
“A is the brother of B. C is the mother of A and D. How is D related to B?”
Solution Approach:
Draw a family tree using symbols (e.g., ○ for male, △ for female).
Step 1: A (♂) → Brother of B (♀).
Step 2: C (♀) → Mother of A and D.
Step 3: Since C is the mother of A and D, D could be male or female. But since A is male and B is female, D must be B’s sibling (sister/brother).
Answer: D is B’s sibling (either brother or sister).
Key Tips:
Use process of elimination for relationships.
Assume gender if not specified (e.g., "D is a sibling" implies gender-neutral).
2. Seating Arrangement (Linear/Circular)
Sample Question Type:
“Six people are sitting in a circle. A sits between B and E. C sits opposite to D. F sits next to E. Who sits next to A?”
Solution Approach:
Visualize the circle and place known positions.
Step 1: Place A between B and E (clockwise: B-A-E or E-A-B).
Step 2: C is opposite D. Assume positions (e.g., C at 12 o’clock → D at 6 o’clock).
Step 3: F sits next to E. Place F adjacent to E (e.g., E-F or F-E).
Step 4: Fill remaining gaps.
Answer: F and B sit next to A.
Key Tips:
Use clockwise/counter-clockwise conventions.
Mark constraints (e.g., "opposite," "next to") first.
3. Puzzles (Floor/Walls/Colors)
Sample Question Type:
“In a 3x3 grid, each cell has a color (Red, Blue, Green). Adjacent cells (horizontally/vertically) cannot have the same color. How many valid colorings are possible?”
Solution Approach:
Grid Coloring Problem:
First row: 3 choices (R, B, G).
Second row: Each cell must differ from the cell above and adjacent.
For each cell in the second row: 2 choices (excluding the color above and the left neighbor).
Third row: Similar logic to the second row.
Total Combinations: (3 \times 2 \times 2 \times 2 \times 2 \times 2 = 3 \times 2^5 = 96).
Answer: 96 valid colorings.
Key Tips:
Use permutations with constraints.
Break the problem into rows/columns and multiply possibilities.
4. Data Interpretation (Table/Graph)
Sample Question Type:
“A table shows sales (in ₹) of three products (X, Y, Z) over 4 years. What’s the % increase in sales of Y from 2016 to 2018?”
Solution Approach:
Extract Data:
2016: Y = ₹50L
2018: Y = ₹75L
Calculation:
(\text{Increase} = 75 - 50 = 25L)
(\text{Percentage} = \frac{25}{50} \times 100 = 50%).
Answer: 50% increase.
Key Tips:
Focus on units (L = Lakh).
Use (\text{Percentage Change} = \frac{\text{New - Old}}{\text{Old}} \times 100).
5. Syllogism (Logical Statements)
Sample Question Type:
“All birds are mammals. Some mammals are reptiles. Which conclusion follows?”
Solution Approach:
Translate Statements:
All B (birds) are M (mammals).
Some M are R (reptiles).
Possible Conclusions:
Some B are R (Valid, via overlapping categories).
Some R are not B (Valid, as "some" doesn’t imply all).
Answer: Both conclusions are valid.
Key Tips:
Use Venn diagrams to visualize overlaps.
Avoid overextending "all" to "some."
Final Tips for CAT DILR
Time Management: Allocate 40-50 minutes for DILR.
Prioritize High-Weightage Topics: Puzzles, Blood Relations, and Data Analysis.
Practice with Previous Year Questions: Pattern repetition is high in DILR.
For exact 2019 Slot 2 questions, refer to official CAT papers or trusted prep platforms like Vedantu or Cracku. Let me know if you need further clarification! 🚀
|
