List of top Data Interpretation & Logical Reasoning (DILR) Questions asked in CAT

A data set shows the number of books read by 4 students: 

StudentBooks
A5
B8
C12
D15


What is the average number of books read? 
 

A company’s sales data for 3 products (A, B, C) over 2 quarters is: 

QuarterABC
Q1100150200
Q2120180160


What is the percentage increase in sales of product A from Q1 to Q2? 
 

A bar chart shows sales (in Rs. thousand) for 4 products over 3 years: 

YearP1P2P3P4
201150403020
201260504030
201370605040


What is the total sales for P3 across all years? 
 

A table shows the number of cars sold by three dealers A, B, and C over 3 months: 

MonthABC
Jan203025
Feb253520
Mar302530


What is the total number of cars sold by dealer B? 
 

In a survey, 70% of 100 people like Product X, and 60% like Product Y. If 50% like both, how many like only Product X?
In a logical reasoning set, three statements:
- If A is true, then B is false.
- If B is true, then C is true.
- C is false.
Is A true or false?
Using the same production chart, which machine had the highest production increase from Jan to Feb?
Using the same logic puzzle, who is the Doctor?
In a logic puzzle, 4 people (A, B, C, D) have professions (Doctor, Lawyer, Engineer, Teacher). A is not the Doctor. B is the Lawyer. The Teacher is not C. Who is the Engineer?
A data set shows marks of 5 students: 70, 85, 90, 65, 80. What is the range of marks?
In a logical reasoning set, three people (P, Q, R) speak:
- P: I am not the tallest.
- Q: R is taller than P.
- R: Q is the tallest.
Who is the tallest?
Using the same temperature data, which day had the highest temperature?
In a group of 5 people, each shakes hands with every other person exactly once. How many handshakes occur?
Using the same book data, what is the median number of books read?
Using the same logic puzzle, which color is in House 3?
In a logic puzzle, 4 houses are numbered 1 to 4. Each has a unique color (Red, Blue, Green, Yellow) and a unique pet (Cat, Dog, Bird, Fish). House 1 is Red. The Cat is in House 3. The Dog is not in House 4. Which house has the Dog?
Using the same sales data, which product had the lowest sales in Q2?
A group of 6 friends (A, B, C, D, E, F) must be seated in a circle. A and B cannot sit together. How many arrangements are possible?
Using the same bar chart, which product had the highest sales in 2013?
A pie chart shows expenses: Rent (30%), Food (25%), Transport (20%), Savings (15%), Others (10%). If total expenses are Rs. 20,000, how much is spent on Food?
Using the same pie chart, what is the combined expense for Rent and Transport?
In a seating arrangement, 5 people (A, B, C, D, E) sit in a row. A and B must sit together, and C cannot sit at the ends. How many arrangements are possible?
A shop sells pens at Rs. 10, pencils at Rs. 5, and erasers at Rs. 2. If a customer buys 3 pens, 4 pencils, and 5 erasers, what is the total cost?
A Venn diagram shows students studying Physics (P), Chemistry (C), and Biology (B):
- P only: 10, C only: 15, B only: 20
- P and C only: 5, P and B only: 8, C and B only: 7
- All three: 5
How many students study at least one subject?
Using the same Venn diagram, how many students study exactly two subjects?