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Practice Set: 10 Challenging LRDI Questions for This Week

Updated: Jul 11


Welcome to your weekly dose of brain-busters from Rahul Sir Classes! We know that consistent, high-quality practice is the key to cracking the CAT, especially the notoriously unpredictable Data Interpretation & Logical Reasoning (DILR) section. This is where you build the mental muscle needed to tackle complex problems under pressure.

To keep your preparation sharp and aligned with the latest CAT trends, we've designed a challenging practice set of 10 LRDI questions for you this week. This isn't just about solving; it's about strategizing. Focus on set selection, identifying key information, and managing your time effectively.



How to Get the Most Out of This Set:

  • Treat this as a mini-sectional. Time yourself strictly.

  • Aim to solve each set within a 12-15 minute window. This simulates exam conditions.

  • Don't just aim for the right answer; focus on the most efficient method.

  • Analyze your performance afterward. Where did you get stuck? Could you have chosen a different set to start with?

Let's get started and push your limits!


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This Week's Challenging LRDI Questions

(For the Week of July 14, 2025)



SET 1: Logical Reasoning - The Six Programmers (4 Questions)

Six programmers—Ankit, Banya, Charu, Divit, Esha, and Firoz—are to be assigned to three different projects: Project Alpha, Project Beta, and Project Gamma. Each project must have exactly two programmers. The assignment is based on the following conditions:

  1. Ankit and Banya have a conflict and cannot be assigned to the same project.

  2. Charu must be assigned to Project Beta.

  3. Divit and Esha must be assigned to the same project.

  4. Firoz is assigned to a project with a higher priority than Ankit's project. The priorities are, in descending order: Project Alpha, Project Beta, Project Gamma.

Questions:


  1. Which of the following is a possible assignment for Project Alpha?


    (A) Ankit and Divit

    (B) Banya and Firoz

    (C) Ankit and Esha

    (D) Firoz and Divit


  2. If Banya is assigned to Project Beta, which of the following MUST be true?


    (A) Ankit is in Project Gamma.

    (B) Firoz is in Project Alpha.

    (C) Divit is in Project Alpha.

    (D) Esha is in Project Gamma.


  3. Which of the following pairs CANNOT be assigned to the same project?


    (A) Charu and Ankit

    (B) Banya and Charu

    (C) Divit and Firoz

    (D) Ankit and Firoz


  4. If Firoz is assigned to Project Alpha, who must be assigned to Project Gamma?


    (A) Ankit and Banya

    (B) Banya and Esha

    (C) Ankit and another programmer

    (D) Banya and another programmer



SET 2: Data Interpretation - Supermarket Sales (3 Questions)

The bar chart below shows the percentage distribution of total revenue from five different categories—Groceries, Electronics, Apparel, Home Goods, and Pharmacy—for a supermarket in the fiscal year 2024. The total revenue for the year was INR 50 Crores. The table shows the profit margin for each category.

(Note: In a real blog, a bar chart would be embedded here. For this text-based format, the data is presented below.)


Revenue Distribution (FY 2024):

  • Groceries: 30%

  • Electronics: 25%

  • Apparel: 20%

  • Home Goods: 15%

  • Pharmacy: 10%


Category-wise Profit Margin:

Category

Profit Margin

Groceries

8%

Electronics

12%

Apparel

15%

Home Goods

10%

Pharmacy

20%

(Formula: Profit = Revenue × Profit Margin)


Questions:

  1. What is the total profit (in INR Crores) from the Apparel and Pharmacy categories combined?


    (A) 2.5

    (B) 3.0

    (C) 4.0

    (D) 4.5


  2. The profit from the Groceries category is what percentage of the profit from the Electronics category?


    (A) 60%

    (B) 75%

    (C) 80%

    (D) 125%


  3. If the revenue from Electronics is incorrectly calculated and was actually 50% higher than reported, while the total revenue remains the same (meaning revenue from other categories would adjust proportionally), what would be the new profit from the Electronics category (in INR Crores)?


    (A) 2.25

    (B) 3.00

    (C) 3.75

    (D) 4.50



SET 3: Logical Puzzle - The Five Houses (3 Questions)

There are five houses in a row, each painted a different color: Red, Blue, Green, Yellow, and White. The owner of each house is of a different nationality: Indian, German, Swede, Brit, and Dane. Each owner drinks a different beverage: Tea, Coffee, Milk, Water, and Juice. Each owner keeps a different pet: Dog, Cat, Bird, Horse, and Fish.

  1. The Brit lives in the Red house.

  2. The Swede keeps dogs as pets.

  3. The Dane drinks tea.

  4. The Green house is on the immediate left of the White house.

  5. The owner of the Green house drinks coffee.

  6. The person who keeps birds lives in the Yellow house.

  7. The owner of the house in the center drinks milk.

  8. The Indian lives in the first house.

  9. The person who keeps cats lives next to the one who drinks water.

  10. The person who keeps the horse lives next to the Indian.

  11. The German drinks juice.

  12. The Indian lives next to the Blue house.


Questions:

  1. Who drinks water?


    (A) The Indian

    (B) The German

    (C) The Brit

    (D) The Swede


  2. The owner of the White house keeps which pet?


    (A) Fish

    (B) Horse

    (C) Cat

    (D) Dog


  3. Which of the following statements is correct?


    (A) The German lives in the Green house.

    (B) The owner of the Yellow house drinks tea.

    (C) The Brit keeps fish as a pet.

    (D) The Swede lives in the Blue house.



Solutions Coming Soon!

Challenge yourself with these sets. The detailed solutions and a step-by-step breakdown of the logic will be posted later this week. The real learning happens when you compare your approach to the optimal one.

Keep pushing your boundaries. All the best!



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FAQs

Q1. How many LRDI sets should I aim to solve daily?

For consistent improvement, aim to solve at least 2-3 LRDI sets daily. Focus on understanding the logic and identifying the correct approach rather than just getting the answer.


Q2. What types of LRDI sets are most common in CAT?

CAT LRDI commonly features arrangement-based puzzles (linear, circular, matrix), selection & distribution, games & tournaments, Venn diagrams, and data interpretation sets based on tables, charts (bar, pie, line), and caselets.


Q3. How important is time management in LRDI?

Time management is critical in LRDI. It's essential to quickly scan sets, identify solvable ones, and avoid getting stuck. Practice solving sets within strict time limits to improve your speed and accuracy.


Q4. Can Rahul Sir Classes help with personalized LRDI strategy?

Yes. Rahul Sir Classes provides comprehensive LRDI modules, live classes, and personalized mentorship to help you develop effective set selection strategies, improve problem-solving skills, and master time management for the CAT DILR section.

 
 
 

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