Preparation guide
ONGC Aptitude Questions
Overview
This page has ONGC aptitude questions with full solutions - numerical ability, verbal, and logical reasoning - in the style students report for the ONGC GATE-based Recruitment. Start with the timed mock quiz, then work the solved set and log every miss by topic.
ONGC 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
Pointing to a photograph, a man said, "She is the daughter of my grandfather's only son." How is the man related to the person in the photograph?
Grandfather's only son = man's father Daughter of man's father = man's sister So the person is the man's sister
Quantitative
The average of 5 numbers is 20. If one number is removed, the average becomes 18. Find the removed number.
Correct answer: 28
Reasoning
All roses are flowers. Some flowers fade quickly. Conclusion: All roses fade quickly.
Only some flowers.
Verbal
Identify the correctly spelled word:
Accommodate has double "c" and double "m".
Quantitative
If the perimeter of a rectangle is 60 cm and its length is twice its breadth, find the area of the rectangle.
Let breadth = x cm, length = 2x cm Perimeter = 2(length + breadth) = 2(2x + x) = 6x = 60 x = 10 cm Length = 20 cm, Breadth = 10 cm Area = 20 × 10 = 200 cm²
Verbal
Choose the correct synonym for "Ephemeral":
"Ephemeral" means lasting for a very short time, temporary. "Temporary" is the synonym.
Reasoning
Odd one out: 121, 144, 169, 196, 225
Others are odd squares.
Quantitative
A, B, and C can complete a work in 10, 15, and 20 days respectively. If they work together, in how many days will they complete the work?
Correct answer: 4.62 days
Reasoning
A person walks 5 km north, then 3 km east, then 2 km south. How far and in which direction is he from the starting point?
Net north = 5 - 2 = 3 km Net east = 3 km Distance = √(3² + 3²) = √18 = 3√2 km Direction = Northeast
Verbal
Problem: "She is good _____ mathematics." a) at b) in c) on d) with
"Good at" is the correct prepositional phrase for skills.
Verbal
Synonym of "Meticulous":
Meticulous means detailed.
Reasoning
Odd one out: 8, 27, 64, 100, 125
Others are perfect cubes; 100 is not.
Reasoning
Odd one out: Triangle, Square, Circle, Rectangle
Circle has no straight sides.
Quantitative
Reading Comprehension - Main Idea (2025)
Correct answer: Renewable energy and its growing importance
Quantitative
If 3x + 5 = 20, then x equals:
3x = 15 → x = 5.
Your score
0/15(0%)
Review
ONGC aptitude topics students usually practice
- Numerical / quantitative: percentages, profit and loss, ratios, time and work, averages, SI/CI, speed-distance
- Logical reasoning: series, coding-decoding, blood relations, seating, syllogisms
- Verbal ability: grammar, vocabulary, error spotting, idioms
Numerical ability questions
Q1: Boat upstream
Problem: A boat’s speed in still water is 15 km/h and the stream is 3 km/h. How long to cover 36 km upstream?
Solution: Upstream speed = 15 − 3 = 12 km/h. Time = 36 / 12 = 3 hours.
Answer: 3 hours
Q2: Compound mark-discount
Problem: An article is marked 40% above cost and sold after a 10% discount. Find the profit percent.
Solution: SP = CP × 1.4 × 0.9 = 1.26 CP. Profit = 26%.
Answer: 26%
Q3: Percentage recover
Problem: If 30% of a number is 150, what is the number?
Solution: 0.3x = 150 → x = 150 / 0.3 = 500.
Answer: 500
Q4: Average speed
Problem: A person covers a distance at 60 km/h and returns at 40 km/h. What is the average speed for the whole trip?
Solution: For equal distances, average speed = 2ab/(a+b). = 2×60×40 / (60+40) = 4800/100 = 48 km/h.
Do not take the arithmetic mean (50); that would be wrong here.
Answer: 48 km/h
Q5: Chain rule copies
Problem: 8 printers print 800 pages in 4 hours. How many printers for 1200 pages in 3 hours?
Solution: Pages ∝ printers × time. 800/(8×4)=1200/(p×3) → 25 = 1200/(3p) → 75p=1200 → p=16.
Answer: 16
Q6: Fraction simplify
Problem: Simplify: (3/4) ÷ (9/8) × (2/3).
Solution: (3/4) × (8/9) × (2/3) = (3×8×2)/(4×9×3) = 48/108 = 4/9.
Answer: 4/9
Q7: Algebra ages
Problem: Father is 3 times as old as son. After 12 years he will be twice as old. Son’s present age?
Solution: 3x + 12 = 2(x + 12) → 3x + 12 = 2x + 24 → x = 12.
Answer: 12 years
Q8: Discount successive
Problem: Two successive discounts of 10% and 20% equal a single discount of?
Solution: Net multiplier = 0.9 × 0.8 = 0.72 → 28% single discount.
Answer: 28%
Q9: Cube surface
Problem: A cube has side 6 cm. What is its total surface area?
Solution: TSA = 6a² = 6 × 36 = 216 cm².
Answer: 216 cm²
Q10: CI vs SI hint
Problem: Find compound interest on ₹10,000 at 10% per annum for 2 years, compounded annually.
Solution: Amount = 10000 × (1.1)² = 10000 × 1.21 = ₹12,100. CI = 12100 − 10000 = ₹2100. (SI for same period would be ₹2000; the extra ₹100 is interest on first-year interest.)
Answer: ₹2100
Verbal ability questions
Q11: Error spotting
Problem: Spot the error: ‘Neither of the boys have submitted their assignment.’
Solution: ‘Neither’ is singular, so the verb should be ‘has’ (and ideally ‘his’ / ‘their’ per style guide). Correct: Neither of the boys has submitted his assignment.
Answer: have → has
Q12: One word - bibliophile
Problem: A person who loves books is called a?
Solution: Bibliophile.
Answer: Bibliophile
Q13: Fill in the blank
Problem: She _____ to the office every day by metro. (go / goes / going / gone)
Solution: Third-person singular present needs ‘goes’.
Answer: goes
Q14: Error spotting subject
Problem: Identify the error: The list of items are on the table.
Solution: ‘List’ is singular → ‘is’ not ‘are’.
Answer: are → is
Q15: Synonym - mitigate
Problem: Choose the best synonym of ‘mitigate’.
Solution: ‘Mitigate’ means to make less severe. Closest match: alleviate.
Answer: Alleviate
Q16: Idiom - piece of cake
Problem: What does ‘a piece of cake’ mean?
Solution: It means something very easy.
Answer: Very easy
Reasoning ability questions
Q17: Series alternate
Problem: Find next: 2, 3, 5, 8, 12, ?
Solution: Differences +1,+2,+3,+4,+5 → next diff 5 → 17.
Answer: 17
Q18: Syllogism
Problem: Statements: All engineers are graduates. Some graduates are managers. Conclusion: Some engineers are managers. Does it follow?
Solution: The ‘some graduates’ who are managers need not overlap with the engineers. The conclusion does not follow necessarily.
Answer: Does not follow
Q19: Analogy
Problem: Book is to Reading as Fork is to ?
Solution: A book is used for reading; a fork is used for eating.
Answer: Eating
Q20: Direction return
Problem: You walk 2 km east, 3 km south, 2 km west. How far from start?
Solution: East/west cancel; 3 km south from start.
Answer: 3 km south
Q21: Odd one shapes
Problem: Odd one out: Circle, Square, Triangle, Cube
Solution: Cube is 3D; others are 2D shapes.
Answer: Cube
Q22: Mirror clock
Problem: A clock shows 3:15. What is the mirror image time approximately (12-hour mirror)?
Solution: Mirror of h:m is roughly 12:00 − 3:15 → 8:45.
Answer: 8:45
Timed practice tips for ONGC
- First pass: only high-confidence questions
- Mark and skip time sinks early
- Keep verbal accuracy high - these are easy marks if you stay calm
- Run the mock quiz at least three times a week under real timing
- Sleep properly the night before; fatigue hurts DI and calculation accuracy