OSSSC (Odisha Subordinate Staff Selection Commission) conducts recruitment exams for various posts including Revenue Inspector (RI), Assistant Revenue Inspector (ARI), Amin, Statistical Field Surveyor (SFS), and ICDS Supervisor. One of the key sections in these exams is Reasoning Ability, which assesses candidates’ logical and analytical thinking skills. To help aspirants prepare effectively, here are the top 30 Reasoning MCQs for OSSSC recruitment exams.
Top 30 Reasoning MCQs For OSSSC RI,ARI, Amin, SFS, ICDS Supervisor
- Complete the series: 2, 6, 12, 20, ?
A. 28
B. 30
C. 36
D. 42
Solution:
The series increases by adding consecutive even numbers: +4, +6, +8, +10. Next term:
20+10=30.
Correct Answer: B. 30 - Find the missing term: A, D, G, J, ?
A. L
B. M
C. N
D. O
Solution:
The series adds 3 to the position of the letters (1, 4, 7, 10, ?). Next term: 13th letter (M).
Correct Answer: B. M - Bread is to Bakery as Brick is to ________.
A. Mason
B. Kiln
C. Cement
D. Building
Solution:
Bread is made in a bakery; similarly, bricks are made in a kiln.
Correct Answer: B. Kiln - Odometer is to Distance as Compass is to ________.A. Speed
B. Direction
C. Energy
D. Altitude
Solution:
Odometer measures distance; compass shows direction.
Correct Answer: B. Direction - Which one does not belong to the group? Iron, Copper, Zinc, OxygenA. Iron
B. Copper
C. Zinc
D. Oxygen
Solution:
Iron, Copper, and Zinc are metals; Oxygen is a non-metal.
Correct Answer: D. Oxygen - Find the odd one out: Table, Chair, Cupboard, ComputerA. Table
B. Chair
C. Cupboard
D. Computer
Solution:
Table, Chair, and Cupboard are furniture; Computer is an electronic device.
Correct Answer: D. Computer - A is the mother of B. C is the sister of A. D is the son of C. What is D to B?A. Brother
B. Cousin
C. Uncle
D. Nephew
Solution:
D is B’s cousin.
Correct Answer: B. Cousin - Pointing to a man, a woman said, “He is the only son of my mother’s mother.” How is the man related to the woman?A. Brother
B. Uncle
C. Nephew
D. Cousin
Solution:
“Mother’s mother’s only son” is her uncle.
Correct Answer: B. Uncle - A man walks 10 km towards the north. From there, he walks 6 km towards the south. Then he walks 3 km towards the east. How far and in which direction is he from the starting point?
A. 5 km East
B. 5 km West
C. 4 km North-East
D. 7 km North
Solution:
Net displacement: 4 km north and 3 km east.
Distance: Sq root(4^2+3^2)=16+9=5 km.
Correct Answer: A. 5 km East - Rohan walks 20 meters North. He turns right and walks 6 meters. Then he turns right and walks 35 meters. Then he turns left and walks 6 meters. Finally, he turns left and walks 15 meters. How far is he from the starting point?
A. 20 meters
B. 13 meters.
C. 30 meters
D. 35 meters
Solution:
He ends up 12 meters East and 5 meters South from the starting point. Distance:
sqrt(a2^2+5^2)=13 meters.
Correct Answer: B. 13 meters. - If TABLE is coded as GZYOV, how is CHAIR coded?
A. XSZRI
B. SXZQI
C. SXZSH
D. SXZRJ
Solution:
Reverse the alphabet (A=Z, B=Y, etc.).
TABLE (T=G, A=Z, B=Y, L=O, E=V). Similarly, CHAIR (C=X, H=S, A=Z, I=R, R=I).
Correct Answer: A. XSZRI - If FRIEND is coded as HUMJTK, how is ENEMY coded?
A. GQZOC
B. GMZOC
C. GQZNC
D. GQYOC
Solution:
Each letter is shifted two places forward.
FRIEND (F=H, R=U, I=M, E=J, N=T, D=K). Similarly, ENEMY (E=G, N=Q, E=Z, M=O, Y=C).
Correct Answer: A. GQZOC - Which of the following Venn diagrams best illustrates the relationship among Earth, Planet, and Sun?
Solution:
Earth is a part of the Planet, and Planets are part of the Solar System around the Sun.
Correct Answer: B. Three circles with Earth inside Planet and Planet inside Sun - Which Venn diagram best illustrates the relationship among Students, Boys, and Girls?
Solution:
Boys and Girls are subsets of Students.
Correct Answer: A. Two intersecting circles within a larger circle - Statements: All dogs are cats. All cats are animals.
Conclusions:
All dogs are animals.
Some animals are cats.
A. Only 1 follows
B. Only 2 follows
C. Both 1 and 2 follow
D. Neither 1 nor 2 follows
Solution:
Both conclusions follow logically.
Correct Answer: C. Both 1 and 2 follow - Statements: Some apples are fruits. No fruit is a vegetable.
Conclusions:
Some apples are vegetables.
No apple is a vegetable.
A. Only 1 follows
B. Only 2 follows
C. Both 1 and 2 follow
D. Neither 1 nor 2 follows
Solution:
No apple is a vegetable.
Correct Answer: B. Only 2 follows - Question: How many children are there in the class?
Statements:
There are 24 chairs in the class.
There are 30 children in the class.
A. Statement 1 alone is sufficient.
B. Statement 2 alone is sufficient.
C. Both statements together are sufficient.
D. Both statements together are not sufficient.
Solution: Statement 2 alone is sufficient. Correct Answer: B. Statement 2 alone is sufficient - Question: Is John older than Mike?
Statements:
John is older than Sara.
Sara is older than Mike.
A. Statement 1 alone is sufficient.
B. Statement 2 alone is sufficient.
C. Both statements together are sufficient.
D. Both statements together are not sufficient.
Solution:
Both statements together are sufficient.
Correct Answer: C. Both statements together are sufficient - Assertion (A): Water boils at 100°C.
Reason (R): Water is a liquid.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Solution:
Both are true, but R does not explain A.
Correct Answer: B. Both A and R are true but R is not the correct explanation of A - Assertion (A): Earth rotates on its axis.
Reason (R): Earth is a planet.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Solution:
Both are true, but R does not explain A.
Correct Answer: B. Both A and R are true but R is not the correct explanation of A - Three friends, A, B, and C, are sitting in a row. B is to the right of A, and C is to the right of B. Who is sitting in the middle?
A. A
B. B
C. C
D. Cannot be determined
Solution:
The order is A, B, C. So, B is in the middle.
Correct Answer: B. B - In a certain code, ‘123’ means ‘sweet and cold’, ‘147’ means ‘drink is sweet’, and ‘325’ means ‘hot and cold’. Which digit means ‘hot’?
A. 1
B. 2
C. 3
D. 5
Solution:
‘325’ and ‘123’ have ‘2’ in common which means ‘cold’. ‘325’ means ‘hot and cold’, so ‘5’ must mean ‘hot’.
Correct Answer: D. 5 - At what time between 4 and 5 o’clock will the hands of the clock be at right angles?
A. 4:20
B. 4:30
C. 4:40
D. 4:45
Solution:
At 4:32, the hands of the clock will be at right angles.
Correct Answer: B. 4:32 - How many times in a day, are the hands of a clock in a straight line but opposite in direction?
A. 20
B. 22
C. 24
D. 48
Solution:
Hands are opposite 22 times in 24 hours.
Correct Answer: B. 22 - If 15th August 2021 is Sunday, what was the day on 15th August 2020?
A. Friday
B. Saturday
C. Sunday
D. Monday
Solution:
2020 was a leap year, so 15th August 2020 was Saturday.
Correct Answer: B. Saturday - If today is Monday, what day of the week will it be 50 days from now?
A. Wednesday
B. Thursday
C. Friday
D. Saturday
Solution:
50÷7=7 weeks and 1 day. So, 50 days from Monday is Tuesday.
Correct Answer: A. Tuesday - Find the missing number in the series: 5, 11, 23, 47, ?A. 95
B. 101
C. 99
D. 103
Solution:
Series doubles and subtracts 1:
(5×2+1,11×2+1,23×2+1).
Next term:47×2+1=95.
Correct Answer: A. 95 - What is the missing number in the sequence: 2, 4, 12, 48, ?A. 120
B. 192
C. 240
D. 336
Solution:
Each term is multiplied by increasing natural numbers:
2×2=4,4×3=12,12×4=48,48×5=240.
Correct Answer: C. 240 - Which letter is midway between the 4th letter from the left and the 18th letter from the right in the alphabet?
A. K
B. L
C. M
D. N
Solution:
The 4th letter from the left is D, the 18th letter from the right is I. Midway letter: (D, E, F, G, H, I) → G.
Correct Answer: B. G - If in a code language, ‘CODING’ is written as ‘XLMROX’, how would ‘DECODER’ be written in that code?
A. WKVDVKW
B. WLVEXKW
C. WLVEVKW
D. WLVFUKW
Solution:
Each letter is replaced by the 23rd letter from it in the alphabet.
DECODER (D=W, E=X, C=X, O=L, D=W, E=X, R=K). The code: WXLLXWK.
Correct Answer: A. WKVDVKW
