Here’s a structured guide to solving DILR (Data Interpretation and Logic Reasoning) questions typically found in CAT 2018 Slot 3, with examples and strategies tailored for Indian exams:
Key DILR Topics in CAT 2018 Slot 3
Data Interpretation (Charts/Graphs/Tables)
Logic Puzzles (Sequencing, Grouping, Matching)
Caselets (Real-world scenarios with multiple data points)
Example Question 1: Data Interpretation (Bar Graph)
Prompt:
A bar graph shows the number of students (in thousands) enrolled in 4 courses (A, B, C, D) across 3 years (2016–2018). Answer the following:
Which course saw the highest year-over-year growth from 2017 to 2018?
Calculate the total enrollment for Course C in all three years.
Solution:
Step 1: Compare 2018 and 2017 values for each course.
Course A: 2017=5k, 2018=6k → 20% growth
Course B: 2017=7k, 2018=7.5k → 7.14% growth
Course C: 2017=10k, 2018=9k → -10% decline
Course D: 2017=4k, 2018=5k → 25% growth
Answer: Course D.
Step 2: Sum values for Course C:
2016=8k + 2017=10k + 2018=9k = 27k
Answer: 27,000.
Example Question 2: Logic Puzzle (Sequencing)
Prompt:
Four friends (A, B, C, D) plan a trip. Constraints:
A cannot go with C.
B must go with D.
At most two people can travel together.
Question: How many valid trip combinations are possible?
Solution:
Step 1: List pairs without violating constraints:
Valid pairs: AB, AD, BD, CD (AC and BC are invalid).
Step 2: Count possible trips (each pair is a valid trip):
4 combinations (AB, AD, BD, CD).
Answer: 4.
Pro Tips for CAT DILR
Skim Questions First:
Read all questions before analyzing data to target specific values.
Use Shortcuts:
For percentages: ( \text{Growth} = \frac{\text{New - Old}}{\text{Old}} \times 100 ).
For averages: ( \frac{\text{Sum}}{\text{Count}} ).
Logic Puzzles:
Create tables/matrix for constraints (e.g., gender, age, preferences).
Eliminate options systematically (e.g., "If A is selected, then C must be excluded").
Common CAT 2018 DILR Errors to Avoid
Overlooking Units: Ensure numbers are in thousands (e.g., 5k = 5,000).
Mishandling Negative Growth: A decline is not a "growth" (e.g., Course C in the example).
Time Management: Spend ≤ 30 mins on DILR (total 60 mins for 40 questions).
Final Strategy
Practice Previous Year slot papers (CAT 2018 Slot 3 is ideal).
Mock Tests: Simulate exam conditions to improve speed.
Focus on High-Weightage Topics: Sequencing, Blood Relations, and Graph Analysis.
Let me know if you need specific question breakdowns or more examples! 🚀
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