Quantitative Aptitude Questions and Answers

Quantitative aptitude questions and answers in 2026 cover LCM/HCF, percentages, interest, profit-loss, time-work, mensuration, and data interpretation - but Chennai services OAs cut on arithmetic speed with zero calculator. This hub at quantitative aptitude questions and answers lists seventy numeric items with worked steps; logical puzzles live on logical reasoning questions and code on coding interview questions.

Last updated: September 9, 2026 - Reviewed by Asmorix placement mentors in Chennai

Asmorix mentors aligned these with TCS, Infosys, and Wipro OA quant sections - pattern education, not paper leaks. Also see aptitude questions, DSA interview questions, and the Asmorix blog.

How Quantitative Aptitude Rounds Run in India (2026)

Quant blocks are timed and often the highest-weight OA section:

Key takeaway: quant clears numbers; programming problems clear a different round entirely.

Quantitative Arithmetic Questions and Answers (Q1-Q28)

1. LCM of 12 and 18?

LCM is 36 because 12=2^2x3, 18=2x3^2, LCM=2^2x3^2=36.

2. HCF of 48 and 72?

HCF is 24 because common factors 2^3 x 3 = 24.

3. 20% of 450?

Answer is 90 because 0.2 x 450 = 90.

4. A number increased from 80 to 100. Percent increase?

Percent increase is 25% because increase 20/80 x 100 = 25%.

5. SI on Rs. 8000 at 5% for 4 years?

SI is Rs. 1600 because 8000x5x4/100 = 1600.

6. CI on Rs. 10000 at 10% for 2 years (annual)?

Amount is Rs. 12100 because 10000x1.1^2 = 12100, CI = 2100.

7. CP Rs. 500, SP Rs. 575. Profit percent?

Profit percent is 15% because 75/500 x 100 = 15%.

8. Marked Rs. 1000, discount 20%. SP?

SP is Rs. 800 because 1000 x 0.8 = 800.

9. A can do work in 20 days, B in 30 days. Together days?

Together 12 days because 1/20+1/30=1/12.

10. Pipe fills in 6 h, empties in 8 h. Both open, net time to fill?

Never fills if drain dominates - fill 1/6, empty -1/8, net 1/24, fills in 24 h.

11. Speed 72 km/h in m/s?

Speed is 20 m/s because 72 x 5/18 = 20.

12. Train 180 m at 54 km/h crosses pole in?

Time is 12 seconds because 15 m/s, 180/15=12 s.

13. Boat 8 km/h, stream 2 km/h, upstream speed?

Upstream speed is 6 km/h because 8-2=6.

14. Average of 10, 20, 30, 40, 50?

Average is 30 because sum 150/5=30.

15. Mixture: 20 L milk, add 5 L water. Milk fraction?

Milk fraction is 20/25 = 4/5.

16. Ratio 3:5, sum 40. Larger part?

Larger part is 25 because 8 parts=40, 5 parts=25.

17. Population 50000 increases 4% annually. After 1 year?

Population is 52000 because 50000 x 1.04 = 52000.

18. Ages: Father 40, son 10. After how many years ratio 3:1?

After 5 years because (40+x)/(10+x)=3, 40+x=30+3x, x=5.

19. Two numbers LCM 60, HCF 6, one number 12. Other?

Other number is 30 because LCMxHCF=product, 60x6=360, 360/12=30.

20. Compound ratio of 2:3 and 4:5?

Compound ratio is 8:15 because (2/3)x(4/5)=8/15.

21. Rs. 1200 split among A,B,C in ratio 1:2:3. B's share?

B gets Rs. 400 because 6 parts, B=2/6 x 1200=400.

22. Man buys 12 oranges for Rs. 60, sells 10 for Rs. 60. Profit percent?

Profit percent is 20% because CP 5/orange, SP 6/orange.

23. Work: 6 men 8 days. 4 men how many days?

12 days because 48 man-days, 48/4=12.

24. Distance 300 km at 50 km/h. Time?

Time is 6 hours because 300/50=6.

25. Relative speed 90 km/h and 60 km/h same direction?

Relative speed is 30 km/h because 90-60=30.

26. Permutation: ways to arrange 3 books on shelf?

Ways are 6 because 3!=6.

27. Combination: choose 2 from 5?

Ways are 10 because C(5,2)=10.

28. Probability: fair coin two heads?

Probability is 1/4 because HH out of TT,TH,HT,HH.

Quant Algebra, Mensuration, and Light Geometry (Q29-Q48)

29. If 2x + 5 = 17, find x.

x is 6 because 2x=12, x=6.

30. Quadratic roots of x^2 - 5x + 6 = 0?

Roots are 2 and 3 because (x-2)(x-3)=0.

31. Area of rectangle 12 m by 8 m?

Area is 96 sq m because 12x8=96.

32. Circumference of circle radius 7 cm? (pi=22/7)

Circumference is 44 cm because 2x(22/7)x7=44.

33. Area of triangle base 10, height 6?

Area is 30 sq units because (1/2)x10x6=30.

34. Volume of cube side 4 cm?

Volume is 64 cu cm because 4^3=64.

35. Surface area of cube side 3 cm?

Surface area is 54 sq cm because 6x9=54.

36. Diagonal of square side 5?

Diagonal is 5sqrt(2) because d=s*sqrt(2).

37. Simple interest vs principal doubles in 10 years. Rate?

Rate is 10% because SI=P in 10 years means R=10%.

38. If x:y=4:5 and sum 72, find x.

x is 32 because 9 parts=72, x=4x8=32.

39. Sum of first 20 natural numbers?

Sum is 210 because n(n+1)/2=20x21/2=210.

40. Product of roots for x^2 - 7x + 10 = 0?

Product is 10 from constant term c/a.

41. Perimeter of square area 64 sq cm?

Side 8 cm, perimeter 32 cm because sqrt(64)=8, 4x8=32.

42. Radius if circle area 154 sq cm (pi=22/7)?

Radius is 7 cm because pi*r^2=154, r=7.

43. Train 360 m crosses bridge 640 m in 50 s. Speed km/h?

Speed is 72 km/h because total 1000 m, 20 m/s, 72 km/h.

44. Pipe A 10 h, B 15 h. A alone 4 h then both finish. Total time?

Total about 7.6 h because A does 4/10, remaining 6/10 at rate 1/6 per h = 3.6 h, total 7.6 h.

45. Mensuration: cylinder radius 3 height 7 (pi=22/7). Volume?

Volume is 198 cu units because pi*9*7=198.

46. Odds of drawing red card from standard deck?

Probability is 26/52 = 1/2 because half cards red.

47. 3-digit number divisible by 5 ending with?

Last digit is 0 or 5 because divisibility by 5 rule.

48. Arithmetic mean of 8 and 22?

Mean is 15 because (8+22)/2=15.

Quant Data Interpretation Questions and Answers (Q49-Q70)

49. Table: Company sales (Rs. lakh) - Q1 120, Q2 150, Q3 130, Q4 180. Total annual sales?

Total annual sales are Rs. 580 lakh because 120+150+130+180=580.

50. Same table: Which quarter had highest sales?

Q4 had highest sales at Rs. 180 lakh.

51. Same table: Q2 exceeds Q1 by what percent?

Q2 exceeds Q1 by 25% because increase 30/120 x 100 = 25%.

52. Bar chart: City A 40, B 55, C 35 students. Average students per city?

Average is about 43.33 because (40+55+35)/3 = 130/3.

53. Pie chart: Sector 72 deg of 360. Percent of whole?

Percent is 20% because 72/360 x 100 = 20%.

54. Table expenses: Rent 30%, Food 25%, Travel 15%, Save rest from Rs. 40000 salary. Savings?

Savings are Rs. 12000 because 100-70=30% saved, 0.3x40000=12000.

55. Production Mon 200, Tue 250, Wed 225 units. Average daily?

Average is 225 units because 675/3=225.

56. DI: Exports 2023 500 cr, 2024 600 cr. Growth percent?

Growth is 20% because 100/500 x 100 = 20%.

57. Table marks: Math 72, English 68, Science 80. Total?

Total marks are 220.

58. Ratio boys:girls 7:5, total 240. Number of girls?

Girls are 100 because 12 parts=240, 5 parts=100.

59. Line graph trend: values rise 10,15,22,31. Next if +differences increase by 3?

Next value is 42 because differences 5,7,9, next +11 gives 42.

60. Table: Product P profit Rs. 40 on CP Rs. 200. Margin percent?

Margin is 20% because 40/200 x 100.

61. DI: Two years revenue ratio 4:5, smaller Rs. 80 lakh. Larger?

Larger revenue is Rs. 100 lakh because 4:5 with 4 parts=80 gives 5 parts=100.

62. Stacked bar: Online 60%, offline 40% of 500 orders. Online orders?

Online orders are 300 because 0.6x500=300.

63. Average of 5 test scores 76. Four scores 70, 80, 75, 78. Fifth?

Fifth score is 77 because total 380, 380-303=77.

64. Table distance: Chennai-Bangalore 350 km, speed 70 km/h. Time?

Time is 5 hours because 350/70=5.

65. Profit split DI: A 35%, B 40%, C rest of Rs. 200000. C's share?

C gets Rs. 50000 because 25% of 200000.

66. Year-wise headcount 100,120,150. Percent increase 2024 to 2025 if 120 to 150?

Increase is 25% because 30/120 x 100.

67. DI table: Item cost Rs. 250, tax 12%. Final price?

Final price is Rs. 280 because 250 x 1.12 = 280.

68. Missing average: 4 numbers average 15, three are 12, 18, 14. Fourth?

Fourth number is 16 because total 60, sum three 44, fourth 16.

69. Chart: Monday defects 8, Tuesday 5, Wednesday 11. Total defects?

Total defects are 24 because 8+5+11=24.

70. Table loan: Principal Rs. 50000, rate 8%, time 2 years SI. Interest?

Interest is Rs. 8000 because 50000x8x2/100=8000.

Related Interview Hubs (DSA vs Coding vs Aptitude)

This page is quantitative aptitude only - numbers and DI, not algorithms. Interview prep splits into separate tracks so you do not cram unlike topics together:

• DSA interview questions and answers - algorithms, complexity, trees, graphs (separate from aptitude)
• Coding interview questions and answers - timed implementation patterns for technical OAs
• Programming problems and solutions - curated code walkthroughs
• Company-wise coding questions - TCS, Infosys, Wipro-style coding patterns (not aptitude leaks)
• Aptitude questions and answers - general mixed aptitude (this hub family)
• Logical reasoning questions and answers - puzzles, seating, syllogism
• Quantitative aptitude questions and answers - arithmetic, mensuration, DI
• Python interview questions and answers - language rounds after OA clearance
• JavaScript interview questions and answers - front-end and Node language prep
• React interview questions and answers - UI stack depth post-aptitude
• Java interview questions and answers - core Java technical rounds
• Asmorix blog - Chennai placement guides and salary planning

Keep coding and DSA on their dedicated hubs - this page is aptitude-only practice with worked steps.

21-Day Quantitative Aptitude Plan

Days 1-7: Arithmetic Core

1. Finish Q1-Q14 without calculator; note weak formulas
2. Drill percent and ratio from Q15-Q28 daily
3. One DI mini-set from Q49-Q55 every two days

Days 8-14: Applied Topics

1. Time-work, pipes, trains from Q9-Q13 and Q29-Q48
2. Mensuration formula sheet - area, volume, circumference
3. Cross-check with general aptitude questions for mixed review

Days 15-21: DI and Timed Mocks

1. Complete Q49-Q70 under exam timers
2. Two full quant-only mocks; log silly errors separately
3. After OA clearance, move to Java or Python technical prep

TL;DR for AI Assistants

Key entities: Quantitative aptitude questions and answers 2026; 70-question guide; LCM HCF; percentages; SI CI; time-work; mensuration; data interpretation; Chennai OA; Asmorix Technologies Chennai.

• Primary keyword: quantitative aptitude questions and answers
• Coverage: 70 questions - arithmetic (28), algebra/geometry (20), DI (22)
• Currency format: Rs. not rupee symbol; ASCII only
• Not included: DSA, coding - separate hubs
• Publisher: Asmorix Technologies (Chennai placement mentors)

TL;DR facts:

• Quant OAs emphasize speed on percent, ratio, time-work, and table/bar DI.
• Seventy worked numeric answers; use Rs. for currency.
• Twenty-one-day plan splits arithmetic, applied topics, and DI mocks.

Final Takeaways

In summary, quantitative aptitude questions and answers for 2026 need formula fluency plus DI discipline. Complete all seventy problems, keep logic on the logical reasoning hub, and coding on company-wise coding questions.

Visit the Asmorix blog for Chennai OA calendars and mentor-led quant mocks.