Here’s a structured answer to a typical Logical Reasoning and Data Interpretation (Lrdi) question from the CAT 2023 exam, formatted in English as requested:
Question Type Example
Data Interpretation Set 1
A bar graph shows the percentage distribution of students in three streams (Science, Commerce, Arts) across five years (2018–2022) in a hypothetical college. Answer the following:
Year 2020
Which stream showed the highest percentage increase from 2019 to 2020?
Calculate the approximate percentage decrease in Arts students in 2021 compared to 2020.
Logical Reasoning
Five friends (A, B, C, D, E) are standing in a row. Each holds a different number (1–5).
Clues:
A > B, C < D
E is not adjacent to C.
Who is third from the left?
Solutions
Data Interpretation
Year 2020
Science: 42% (2019: 38%) → 4% increase
Commerce: 45% (2019: 40%) → 12.5% increase
Arts: 13% (2019: 15%) → 13.3% decrease
Answer: Commerce showed the highest increase.
Arts in 2021 vs. 2020
2020: 13% → 2021: 10%
Decrease = (\frac{13-10}{13} \times 100 ≈ 23.08%).
Logical Reasoning
Step 1: Assign positions 1–5.
Step 2: From clues:
A > B → Possible pairs: (A,1,B,2), (A,2,B,1), etc.
C < D → D must be to the right of C.
E ≠ adjacent to C → E cannot be C±1.
Step 3: Test permutations. Valid sequence: B(1), A(2), C(3), D(4), E(5).
Answer: C is third from the left.
Key Tips for CAT Lrdi
Data Interpretation:
Focus on trends, comparisons, and accuracy (e.g., % change vs. absolute numbers).
Use approximations for quick calculations (e.g., 7.2% ≈ 7%).
Logical Reasoning:
Systematically test constraints (e.g., "not adjacent" → gap ≥1).
Prioritize relationships (e.g., "A > B" → A must be to the right of B).
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