Aptitude
Drills
McKinsey placement papers 2024
Overview
Section titled “Overview”McKinsey placement papers 2024. Primary filter: McKinsey Solve / PST. Focus: Case interviews, PST/Solve, communication.
McKinsey Aptitude Mock Quiz
Timed placement-style MCQs with score and explanations after you submit. Use it to check speed and accuracy before the real test.
Questions15
Time10 min
Verbal
Antonym of "Optimistic":
Optimistic ↔ pessimistic.
Reasoning
Statements: 1. All green are blue, 2. All blue are white
From "All green are blue": Some blue are green (I follows) Combined: All green are white, so Some white are green (II follows) and Some green are white (III follows) IV does not follow
Quantitative
Find the error: "The team of players are ready for the match."
"Team" is a collective noun treated as singular, so "is" should be used instead of "are".
Reasoning
Statements: All engineers are professionals. Some professionals are managers. Conclusions: I. Some engineers are managers. II. All managers are engineers.
Analyzing the statements: - All engineers are professionals (A → B) - Some professionals are managers (B → C, some) Conclusion I: Some engineers are managers - Since all engineers are professionals, and some professionals are managers, we can say some engineer
Quantitative
What is 15% of 240?
15% of 240 = 0.15 × 240 = 36.
Reasoning
Arrange in dictionary order: Apple, Apply, Apt, Apex. Third word is:
Order: Apex, Apple, Apply, Apt → third is Apply.
Quantitative
The following table shows the sales of a company over 5 years. If the total sales in 2020 was ₹50,000, and sales increased by 20% each year, find the sales in 2024.
Sales in 2020 = ₹50,000 Sales in 2021 = 50,000 × 1.2 = ₹60,000 Sales in 2022 = 60,000 × 1.2 = ₹72,000 Sales in 2023 = 72,000 × 1.2 = ₹86,400 Sales in 2024 = 86,400 × 1.2 = ₹103,680
Reasoning
All cats are dogs. Some dogs are rats. Conclusions: I. Some cats are rats. II. Some rats are dogs.
II follows from "some dogs are rats". I does not necessarily follow.
Quantitative
A sum of money doubles itself in 8 years at simple interest. What is the annual rate of interest?
Let Principal = P, Amount = 2P Interest = 2P - P = P SI = P × R × T / 100 P = P × R × 8 / 100 1 = 8R / 100 R = 100/8 = 12.5%
Verbal
Choose correct: The news _____ good.
"News" is singular → is.
Reasoning
Find the next number: 2, 6, 12, 20, 30, ?
Differences +4, +6, +8, +10, +12 → next is 42.
Verbal
Read the passage and answer: "Artificial Intelligence is transforming industries by automating processes and enabling data-driven decisions. However, concerns about job displacement and ethical implications remain significant." What is the main concern mentioned?
Correct answer: Job displacement and ethical implications
Verbal
The manager was _____ with the team's performance and decided to reward them.
Correct answer: pleased
Quantitative
If 20% of a number is 48, the number is:
Number = 48 × 100/20 = 240.
Quantitative
The ratio of two numbers is 3:4. If their sum is 84, find the numbers.
Let the numbers be 3x and 4x Sum = 3x + 4x = 7x = 84 x = 12 Numbers = 3(12) = 36 and 4(12) = 48
Your score
0/15(0%)
Review
Sample McKinsey Questions with Solutions
Section titled “Sample McKinsey Questions with Solutions”Practice-style questions (not leaked live papers).
Aptitude / Reasoning
Section titled “Aptitude / Reasoning”Q1: Ratio of ages A:B = 4:5. After 6 years = 6:7. A present age?
Answer: 12 years
Explanation: 4x+6 / 5x+6 = 6/7 => x=3 => A=12.
Q2: Simple interest on Rs.8000 at 10% for 2 years?
Answer: Rs.1600
Explanation: SI = PRT/100 = 1600.
Q3: If 30% of x = 150, x = ?
Answer: 500
Explanation: 0.3x=150 => x=500.
Q4: Average of 5 numbers is 20. One number 30 replaced by 10. New average?
Answer: 16
Explanation: Sum 100 -> 80; avg 16.
Q5: A finishes in 10 days, B in 15. Together?
Answer: 6 days
Explanation: 1/10+1/15=1/6.
Q6: Probability of drawing an ace from a deck?
Answer: 1/13
Explanation: 4/52=1/13.
Q7: Pipe A fills in 6h, B in 8h. Together to fill?
Answer: 24/7 hours
Explanation: 1/6+1/8=7/24.
Q8: CP Rs.500, SP Rs.600. Profit percent?
Answer: 20%
Explanation: (100/500)*100=20%.
Coding Practice
Section titled “Coding Practice”Coding Q1: Coin change min coins
Approach: DP unbounded.
Complexity: O(amount*coins)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q2: Binary search
Approach: Lo/hi mid.
Complexity: O(log n)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q3: Kadane max subarray
Approach: Running best.
Complexity: O(n)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q4: Reverse a string in-place
Approach: Two pointers from ends.
Complexity: O(n)/O(1)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q5: Check prime
Approach: Trial division to sqrt(n).
Complexity: Handle n<2
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q6: Valid parentheses
Approach: Stack matching.
Complexity: O(n)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q7: Two Sum
Approach: Hash map complements.
Complexity: O(n)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q8: Longest substring without repeat
Approach: Sliding window + last index.
Complexity: O(n)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q9: Merge intervals
Approach: Sort + merge.
Complexity: O(n log n)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Coding Q10: Top K frequent
Approach: Count + heap.
Complexity: O(n log k)
McKinsey tip: Narrate brute force then optimize then edge cases before coding.
Deep Prep Notes for McKinsey
Section titled “Deep Prep Notes for McKinsey”How the McKinsey Solve / PST Usually Feels
Section titled “How the McKinsey Solve / PST Usually Feels”Candidates describe a paced filter where easy marks disappear if you over-invest in one hard item. For McKinsey, start with a three-minute scan, mark certainty levels, and protect accuracy. Languages typically include N/A (analyst); tech tracks differ.
Topic Weight Hints (Candidate-Reported)
Section titled “Topic Weight Hints (Candidate-Reported)”| Area | Why it matters at McKinsey |
|---|---|
| Case interviews | Primary shortlist signal |
| Core CS (OOPs/DBMS/OS) | Technical interview depth |
| Management Consulting awareness | Managerial / HR differentiation |
| Communication | Especially for consulting and client-facing GSIs |
14-Day Sprint
Section titled “14-Day Sprint”- Days 1-3: pattern familiarization + 2 sectional mocks
- Days 4-7: weak-topic closed practice
- Days 8-10: full mocks every other day
- Days 11-14: interview narration + light revision
Related
Section titled “Related”Coding
DSA
OA
Assessment
Hub
McKinsey