Prep Guide
Plan
McKinsey aptitude questions
Overview
Section titled “Overview”Practice McKinsey aptitude questions for McKinsey Solve / PST.
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
Question 1
Section titled “Question 1”A train 120 m long runs at 54 km/h. Time to pass a pole?
Answer: 8 seconds
Explanation: 54 km/h = 15 m/s; t = 120/15 = 8 s.
Question 2
Section titled “Question 2”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.
Question 3
Section titled “Question 3”Simple interest on Rs.8000 at 10% for 2 years?
Answer: Rs.1600
Explanation: SI = PRT/100 = 1600.
Question 4
Section titled “Question 4”If 30% of x = 150, x = ?
Answer: 500
Explanation: 0.3x=150 => x=500.
Question 5
Section titled “Question 5”Average of 5 numbers is 20. One number 30 replaced by 10. New average?
Answer: 16
Explanation: Sum 100 -> 80; avg 16.
Question 6
Section titled “Question 6”A finishes in 10 days, B in 15. Together?
Answer: 6 days
Explanation: 1/10+1/15=1/6.
Question 7
Section titled “Question 7”Probability of drawing an ace from a deck?
Answer: 1/13
Explanation: 4/52=1/13.
Question 8
Section titled “Question 8”Pipe A fills in 6h, B in 8h. Together to fill?
Answer: 24/7 hours
Explanation: 1/6+1/8=7/24.
Question 9
Section titled “Question 9”CP Rs.500, SP Rs.600. Profit percent?
Answer: 20%
Explanation: (100/500)*100=20%.
Question 10
Section titled “Question 10”Find next: 2, 6, 12, 20, 30, ?
Answer: 42
Explanation: n(n+1) pattern.
Extra Drill Set (MCKINSEY flavor)
Section titled “Extra Drill Set (MCKINSEY flavor)”Q17: A finishes work in 12 days, B in 17 days. Days together?
Rate = 1/12 + 1/17. Days = reciprocal of that sum.
Answer: compute exactly before the exam; practice the fraction form daily.
Q18: Price increases by 21%. Consumption reduction to keep spend constant?
Reduction % = r/(100+r)×100 with r=21.
Answer: 21/(100+21)×100 (simplify).
Q19: Average of 7 numbers is 18. One number 24 replaced by 10. New average?
Sum 126 → 112 → average 16.
Answer: 16
Q20: SI on ₹8000 at 7.5% for 2 years?
SI = 8000×7.5×2/100 = ₹1200.
Answer: ₹1200
Q21: Synonym of “Mitigate”
Answer: Alleviate / reduce
Q22: Series: 3, 9, 27, 81, ?
Multiply by 3 → 243.
Answer: 243
Q23: If NORTH is coded as 13 (letter count? or positions), prefer position-sum drills for your mock bank.
Practice coding-decoding patterns: +1/−1, reverse, position sums.
Answer: pattern-dependent; master 4 common patterns.
Q24: All engineers are graduates. Some graduates are managers. Conclusion: some engineers are managers?
Does not follow necessarily.
Answer: Does not follow
Related
Section titled “Related”Coding
DSA
2026
Year
McKinsey Hub
Hub