Pointing to a photograph, Mohan said, 'She is the mother of my brother's only son.' Who is the woman in the photograph?

The correct answer is D: Mohan's sister-in-law. Mohan's brother's son = Mohan's nephew. The mother of Mohan's nephew = Mohan's brother's wife = Mohan's sister-in-law.

Pointing to a photo, a woman says 'This man's mother is my mother's daughter.' Who is the man in the photo?

The correct answer is A: Her son. Breaking down: 'My mother's daughter' = the woman herself (or her sister, but in context, herself). 'This man's mother is my mother's daughter' means this man's mother is the woman. Therefore, the man is her son.

Five boxes A, B, C, D, E are kept on a shelf. B is to the right of A. C is to the left of D. E is between C and D. D is to the right of B. What is the order?

The correct answer is A: A-B-C-E-D. B right of A: A-B. C left of D: C-D. E between C and D: C-E-D. D right of B: combining gives A-B-C-E-D.

All cats are animals. Some animals are pets. Which of the following conclusions is definitely true?

The correct answer is B: Some cats are pets. From 'All cats are animals' and 'Some animals are pets', we can only conclude that it's possible some cats are pets, but not definite.

Four friends A, B, C, D sit in a line. A is to the left of B. C is to the right of B. D is to the left of A. What is the correct order?

The correct answer is A: DABC. D is left of A, A is left of B, C is right of B. So order is D-A-B-C

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Reasoning Ability
Coding-Decoding

Critical thinking and logical reasoning questions

50 Q 8 Topics Take Mock Test

Difficulty: All Easy Medium Hard 1–10 of 50

Topics in Reasoning Ability

All Puzzles & Seating Arrangement 172 Syllogism 50 Coding-Decoding 50 Blood Relations 50 Direction & Distance 50 Inequalities 50 Series & Analogies 50 Ranking & Order 50

Q.1 Hard Coding-Decoding

A, B, C, D, E are sitting in a circle. A is opposite to C. B is to the immediate right of A. D is between C and E. Who sits to the immediate left of C?

A E

B D

C B

D A

Correct Answer: A. E

EXPLANATION

In circle: A-B (right of A)-E-D-C (opposite to A). From C going left: C-D-E-B-A. So A sits to the immediate left of C when going counterclockwise

Test

Q.2 Medium Coding-Decoding

Statement I: All engineers are intelligent. Statement II: Some intelligent people are not engineers. Conclusion: Some engineers are not intelligent. Which is valid?

A Conclusion follows from both statements

B Conclusion follows from neither

C Conclusion contradicts the statements

D Conclusion partially follows

Correct Answer: C. Conclusion contradicts the statements

EXPLANATION

If ALL engineers are intelligent (Statement I), then NO engineer can be non-intelligent. The conclusion contradicts Statement I.

Test

Q.3 Medium Coding-Decoding

In a row of 6 people, P is to the left of Q. R is to the right of Q. S is between P and Q. T is at one end. Where is U? (Additional constraint: Q is not at the rightmost end)

A Between R and Q

B To the right of R

C Between S and P

D At the rightmost end

Correct Answer: B. To the right of R

EXPLANATION

Arrangement from left: T-P-S-Q-R-U. T is at left end, P-S-Q-R is the order given, U must be to the right of R

Test

Q.4 Medium Coding-Decoding

Series: 3, 7, 15, 31, 63, ?
What comes next?

A 127

B 125

C 124

D 126

Correct Answer: A. 127

EXPLANATION

Pattern: 2¹+1=3, 2³-1=7, 2⁴-1=15, 2⁵-1=31, 2⁶-1=63, 2⁷-1=127. Each is 2ⁿ-1 where n starts at 2

Test

Q.5 Medium Coding-Decoding

If TIGER is coded as 20-9-7-5-18, how is ZEBRA coded?

A 26-5-2-18-1

B 25-4-1-17-0

C 26-4-2-19-1

D 24-6-3-20-2

Correct Answer: A. 26-5-2-18-1

EXPLANATION

Letters coded by position in alphabet. Z=26, E=5, B=2, R=18, A=1. Answer is 26-5-2-18-1

Test

Q.6 Easy Coding-Decoding

Ram is 4 years older than Shyam. Shyam is 3 years younger than Priya. If Priya is 20 years old, how old is Ram?

A 20 years

B 21 years

C 23 years

D 24 years

Correct Answer: B. 21 years

EXPLANATION

Priya = 20. Shyam = 20-3 = 17. Ram = 17+4 = 21 years

Test

Q.7 Easy Coding-Decoding

Statement I: All doctors are professionals. Statement II: Some professionals are not doctors. Which is true?

A Both I and II are true

B Both I and II are false

C Only I is true

D Only II is true

Correct Answer: A. Both I and II are true

EXPLANATION

If all doctors are professionals, then some professionals must be non-doctors (engineers, architects, etc.). Both statements are logically consistent.

Test

Q.8 Easy Coding-Decoding

Series: 2, 6, 12, 20, 30, ?
What comes next?

A 40

B 42

C 44

D 45

Correct Answer: B. 42

EXPLANATION

Pattern: 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42. Each term is n(n+1) where n increases by 1

Test

Q.9 Easy Coding-Decoding

APPLE is to FRUIT as CARROT is to ?

A VEGETABLE

B ORANGE

C FOOD

D PLANT

Correct Answer: A. VEGETABLE

EXPLANATION

Apple is a type of fruit. Carrot is a type of vegetable. The relationship is part-to-whole category classification.

Test

Q.10 Easy Coding-Decoding

A man walks 5 km East, then 3 km South, then 2 km West. How far is he from his starting point?

A √34 km

B √29 km

C √45 km

D 6 km

Correct Answer: A. √34 km

EXPLANATION

Final position: East 3 km, South 3 km. Distance = √(3² + 3²) = √18 km. Using displacement: √(3² + 3²) = √18 ≈ but recalculating: Net East = 5-2 = 3, Net South = 3. √(9+25) = √34 km

Test

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Reasoning Ability Coding-Decoding

Reasoning Ability
Coding-Decoding