Aptitude
Drills
BlackRock placement papers 2025
Overview
Section titled “Overview”BlackRock placement papers 2025. Primary filter: BlackRock Online Assessment. Focus: DSA, systems, finance/quant basics.
BlackRock 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
Quantitative
A sum of money amounts to ₹9800 after 5 years and ₹12005 after 8 years at the same rate of simple interest. Find the rate of interest per annum.
Let Principal = P, Rate = R% After 5 years: P + (P × R × 5)/100 = 9800 After 8 years: P + (P × R × 8)/100 = 12005 Subtracting: (P × R × 3)/100 = 12005 - 9800 = 2205 P × R = 73500 From first equation: P + (73500 × 5)/100 = 9800 P + 3675 = 9800 P = 6125 Rate R =
Reasoning
Which of the following is the next term in the series: 2, 6, 12, 20, 30, ?
Pattern: Differences are 4, 6, 8, 10 (consecutive even numbers) Next difference = 12 Next term = 30 + 12 = 42 Alternative pattern: n(n+1) where n starts from 1 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42
Quantitative
What does "Break the ice" mean?
"Break the ice" means to initiate conversation in a social setting.
Quantitative
A student scored 60, 70, and 80 in three subjects. If the weights are 2, 3, and 5 respectively, find the weighted average.
Correct answer: 73
Quantitative
Simple interest on ₹5,000 at 8% p.a. for 3 years is:
SI = PRT/100 = 5000×8×3/100 = ₹1,200.
Verbal
Problem: "She is allergic _____ peanuts." a) to b) from c) with d) by
"Allergic to" is the correct prepositional phrase.
Verbal
Choose the correctly spelled word:
Correct spelling is Accommodation.
Verbal
Synonym of "Candid":
Candid means frank or straightforward.
Reasoning
If A is brother of B, B is sister of C, C is brother of D, how is D related to A?
A, B, C, D share the same generation → siblings (gender of D unknown but sibling).
Quantitative
A person walks 6 km East, then 8 km North. How far is he from the starting point?
Correct answer: 10 km
Reasoning
In how many ways can 5 people be arranged in a row?
Correct answer: 120 ways
Reasoning
Statements: 1) All cups are plates, 2) All plates are tables Conclusions: I) All cups are tables, II) All tables are cups, III) Some tables are cups, IV) Some tables are plates.
Correct answer: Only I, III, and IV follow
Reasoning
Odd one out: Cat, Dog, Tiger, Car
Others are animals.
Quantitative
A number is increased by 20% and then decreased by 20%. The net percentage change is:
100 → 120 → 96. Net change = 4% decrease.
Verbal
The company's profits have been _____ steadily over the past year.
Correct answer: declining
Your score
0/15(0%)
Review
Sample BlackRock Questions with Solutions
Section titled “Sample BlackRock Questions with Solutions”Practice-style questions (not leaked live papers).
Aptitude / Reasoning
Section titled “Aptitude / Reasoning”Q1: Simple interest on Rs.8000 at 10% for 2 years?
Answer: Rs.1600
Explanation: SI = PRT/100 = 1600.
Q2: If 30% of x = 150, x = ?
Answer: 500
Explanation: 0.3x=150 => x=500.
Q3: Average of 5 numbers is 20. One number 30 replaced by 10. New average?
Answer: 16
Explanation: Sum 100 -> 80; avg 16.
Q4: A finishes in 10 days, B in 15. Together?
Answer: 6 days
Explanation: 1/10+1/15=1/6.
Q5: Probability of drawing an ace from a deck?
Answer: 1/13
Explanation: 4/52=1/13.
Q6: Pipe A fills in 6h, B in 8h. Together to fill?
Answer: 24/7 hours
Explanation: 1/6+1/8=7/24.
Q7: CP Rs.500, SP Rs.600. Profit percent?
Answer: 20%
Explanation: (100/500)*100=20%.
Q8: Find next: 2, 6, 12, 20, 30, ?
Answer: 42
Explanation: n(n+1) pattern.
Coding Practice
Section titled “Coding Practice”Coding Q1: Check prime
Approach: Trial division to sqrt(n).
Complexity: Handle n<2
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q2: Valid parentheses
Approach: Stack matching.
Complexity: O(n)
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q3: Two Sum
Approach: Hash map complements.
Complexity: O(n)
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q4: Longest substring without repeat
Approach: Sliding window + last index.
Complexity: O(n)
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q5: Merge intervals
Approach: Sort + merge.
Complexity: O(n log n)
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q6: Top K frequent
Approach: Count + heap.
Complexity: O(n log k)
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q7: Linked list cycle
Approach: Floyd tortoise-hare.
Complexity: O(1) space
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q8: Level order traversal
Approach: BFS queue.
Complexity: O(n)
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q9: Coin change min coins
Approach: DP unbounded.
Complexity: O(amount*coins)
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Coding Q10: Binary search
Approach: Lo/hi mid.
Complexity: O(log n)
BlackRock tip: Narrate brute force then optimize then edge cases before coding.
Deep Prep Notes for BlackRock
Section titled “Deep Prep Notes for BlackRock”How the BlackRock Online Assessment Usually Feels
Section titled “How the BlackRock Online Assessment Usually Feels”Candidates describe a paced filter where easy marks disappear if you over-invest in one hard item. For BlackRock, start with a three-minute scan, mark certainty levels, and protect accuracy. Languages typically include Java, Python, C++.
Topic Weight Hints (Candidate-Reported)
Section titled “Topic Weight Hints (Candidate-Reported)”| Area | Why it matters at BlackRock |
|---|---|
| DSA | Primary shortlist signal |
| Core CS (OOPs/DBMS/OS) | Technical interview depth |
| Asset Management, Aladdin Tech 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
BlackRock
Similar Companies
Section titled “Similar Companies”Bloomberg · Goldman Sachs · JP Morgan · D.E. Shaw · Morgan Stanley · Google