Here’s a structured English explanation of the DILR (Data Interpretation and Logical Reasoning) 2018 Slot 1 for an Indian competitive exam context, focusing on common question patterns and solutions:
DILR 2018 Slot 1: Key Topics & Solutions
1. Data Interpretation (DI)
Graphical Analysis:
Example Question: A bar graph showing sales data for 5 products (A, B, C, D, E) over 4 quarters.
Task: Calculate the percentage increase in sales of Product C from Q1 to Q4.
Solution:
Sales in Q1 = 200, Q4 = 350
% Increase = [(350−200)/200] × 100 = 75%
Tabular Data:
Example: A table with expenses (Food, Housing, Transport, etc.) for two families (X & Y) over 3 years.
Task: Determine the year-on-year growth rate of Family X’s Housing expenses.
Solution:
2016: ₹40,000; 2017: ₹48,000 → 20% increase
2017: ₹48,000; 2018: ₹60,000 → 25% increase
2. Logical Reasoning
Puzzles:
Seating Arrangement:
Question: 8 people (P, Q, R, S, T, U, V, W) sit in a circle. Conditions include:
P sits opposite V.
Q is adjacent to R but not to S.
Solution:
Use process of elimination and positional mapping to fix P and V at opposite ends.
Place Q and R next to each other, avoiding S.
Blood Relations:
Question: If A is the sister of B, and B’s father is C, what is A’s relation to C?
Answer: A is C’s daughter.
Alphanumeric Series:
Task: Arrange letters based on given priorities (e.g., 1st letter alphabetically first).
Strategy: Convert letters to numerical values (A=1, B=2…), sort, and map back.
3. Game-Based Problems
Example:
Question: A team of 5 players (A, B, C, D, E) must be selected from 10 candidates. Conditions:
A and B cannot play together.
C must be included if D is selected.
Solution:
Case 1: D is selected → C must be included. Total ways = C(7,3) = 35.
Case 2: D is not selected → Total ways = C(9,5) = 126.
Total Valid Combinations: 35 + 126 = 161.
4. Clock & Calendar
Question: If today is Monday, what day was it 30 days ago?
Solution:
30 ÷ 7 = 4 weeks + 2 days → Subtract 2 days from Monday → Saturday.
5. Seating & Distance
Question: A starts walking north at 5 km/h. B starts 2 km east of A and walks west at 3 km/h. When will they meet?
Solution:
Relative speed = 5 + 3 = 8 km/h.
Distance = 2 km → Time = 2/8 = 0.25 hours (15 minutes).
Key Tips for DILR 2018 Slot 1
DI: Practice calculating percentages, ratios, and averages quickly.
Puzzles: Draw diagrams for seating/blood relations.
Games: Break into cases and use combinations formulae.
Time Management: Allocate 30 mins to DI and 45 mins to LR.
Final Score: Aim for 25+ marks (out of 40) with 90% accuracy.
Let me know if you need detailed solutions for specific questions!
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