Prep Guide
Plan
D. E. Shaw aptitude questions
Overview
Section titled “Overview”Practice D. E. Shaw aptitude questions for D. E. Shaw Online Test.
D. E. Shaw 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
Reasoning
All pens are books. Some books are papers. Conclusion: Some pens are papers.
No definite overlap between pens and papers.
Reasoning
If in a code, CAT = 24 and DOG = 26, then BAT = ?
Sum of positions: B+A+T = 2+1+20 = 23.
Quantitative
A can do a job in 10 days, B in 15. Days together:
1/10+1/15=1/6 → 6 days.
Quantitative
$10,000 invested at 8% CI for 2 years. Final amount?
Correct answer: 10000 × (1.08)² = $11,664
Reasoning
Odd one out: 8, 27, 64, 100, 125
Others are perfect cubes; 100 is not.
Quantitative
If 3x + 5 = 20, then x equals:
3x = 15 → x = 5.
Reasoning
In how many ways can 5 people be arranged in a row if two particular people must sit together?
Treat the two people as one unit: 4 units to arrange = 4! ways The two people can be arranged among themselves in 2! ways Total = 4! × 2! = 24 × 2 = 48 ways
Verbal
The idiom "a piece of cake" means:
It means: very easy.
Reasoning
Find the missing number: 5, 11, 23, 47, 95, ?
Correct answer: 191
Verbal
One who loves books is a:
Bibliophile = lover of books.
Quantitative
A train 150m long passes a platform 200m long in 14 seconds. Find the speed of the train.
Correct answer: 90 km/hr
Verbal
"The committee have decided": correct form is:
Collective noun "committee" as one unit takes singular "has".
Quantitative
LCM of 12 and 18 is:
LCM(12,18) = 36.
Quantitative
Divide ₹1200 in the ratio 2:3:5.
Correct answer: ₹240, ₹360, ₹600
Verbal
Find antonym of "Benevolent"
Correct answer: Malevolent
Your score
0/15(0%)
Review
Question 1
Section titled “Question 1”Probability of drawing an ace from a deck?
Answer: 1/13
Explanation: 4/52=1/13.
Question 2
Section titled “Question 2”Pipe A fills in 6h, B in 8h. Together to fill?
Answer: 24/7 hours
Explanation: 1/6+1/8=7/24.
Question 3
Section titled “Question 3”CP Rs.500, SP Rs.600. Profit percent?
Answer: 20%
Explanation: (100/500)*100=20%.
Question 4
Section titled “Question 4”Find next: 2, 6, 12, 20, 30, ?
Answer: 42
Explanation: n(n+1) pattern.
Question 5
Section titled “Question 5”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 6
Section titled “Question 6”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 7
Section titled “Question 7”Simple interest on Rs.8000 at 10% for 2 years?
Answer: Rs.1600
Explanation: SI = PRT/100 = 1600.
Question 8
Section titled “Question 8”If 30% of x = 150, x = ?
Answer: 500
Explanation: 0.3x=150 => x=500.
Question 9
Section titled “Question 9”Average of 5 numbers is 20. One number 30 replaced by 10. New average?
Answer: 16
Explanation: Sum 100 -> 80; avg 16.
Question 10
Section titled “Question 10”A finishes in 10 days, B in 15. Together?
Answer: 6 days
Explanation: 1/10+1/15=1/6.
Extra Drill Set (DE flavor)
Section titled “Extra Drill Set (DE flavor)”Q17: A finishes work in 17 days, B in 20 days. Days together?
Rate = 1/17 + 1/20. Days = reciprocal of that sum.
Answer: compute exactly before the exam; practice the fraction form daily.
Q18: Price increases by 14%. Consumption reduction to keep spend constant?
Reduction % = r/(100+r)×100 with r=14.
Answer: 14/(100+14)×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
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