Mental Reasoning MCQs with Answers for JKSSB, SSC & Railway

Question #261

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Find the odd one out: 2, 4, 8, 16, 18

A. 16

B. 18

C. 2

D. 4

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Correct Answer: Option B

Explanation:
2, 4, 8 and 16 are powers of 2, but 18 is not.

This question belongs to: Reasoning Mental Reasoning

Question #262

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Find the odd one out: 15, 21, 27, 28

A. 15

B. 28

C. 27

D. 21

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Correct Answer: Option B

Explanation:
28 is even, while all other numbers are odd.

This question belongs to: Reasoning Mental Reasoning

Question #263

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Find the odd one out: 64, 81, 100, 125, 144

A. 64

B. 144

C. 125

D. 100

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Correct Answer: Option C

Explanation:
125 is a perfect cube, while all other options are perfect squares.

This question belongs to: Reasoning Mental Reasoning

Question #264

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Find the odd one out: 7, 14, 21, 24, 28

A. 21

B. 7

C. 24

D. 28

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Correct Answer: Option C

Explanation:
7, 14, 21 and 28 are multiples of 7, but 24 is not.

This question belongs to: Reasoning Mental Reasoning

Question #265

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Find the odd one out: 2, 3, 5, 7, 9

A. 9

B. 3

C. 7

D. 2

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Correct Answer: Option A

Explanation:
9 is composite, while 2, 3, 5 and 7 are prime numbers.

This question belongs to: Reasoning Mental Reasoning

Question #266

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Find the odd one out: 11, 22, 33, 44, 45

A. 11

B. 45

C. 44

D. 33

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Correct Answer: Option B

Explanation:
11, 22, 33 and 44 are multiples of 11, but 45 is not.

This question belongs to: Reasoning Mental Reasoning

Question #267

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Pointing to a photograph, Ravi says, 'She is the daughter of my grandfather's only son.' How is the girl related to Ravi?

A. Sister

B. Niece

C. Daughter

D. Cousin

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Correct Answer: Option A

Explanation:
Grandfather's only son is Ravi's father. His daughter is Ravi's sister.

This question belongs to: Reasoning Mental Reasoning

Question #268

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Introducing a man, a woman said, 'He is the son of the only daughter of my mother.' How is the man related to the woman?

A. Cousin

B. Brother

C. Nephew

D. Son

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Correct Answer: Option D

Explanation:
The only daughter of her mother is the woman herself. Therefore the man is her son.

This question belongs to: Reasoning Mental Reasoning

Question #269

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A is B's brother, C is B's mother, D is C's father. How is A related to D?

A. Nephew

B. Grandfather

C. Grandson

D. Son

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Correct Answer: Option C

Explanation:
C is A's mother and D is C's father, so D is A's maternal grandfather. A is D's grandson.

This question belongs to: Reasoning Mental Reasoning

Question #270

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P is Q's sister. R is Q's mother. S is R's husband. How is P related to S?

A. Mother

B. Sister

C. Wife

D. Daughter

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Correct Answer: Option D

Explanation:
S is Q's father, and P is Q's sister. Hence P is the daughter of S.

This question belongs to: Reasoning Mental Reasoning

Question #271

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A is father of B. B is sister of C. C is son of D. How is D related to A?

A. Mother

B. Wife

C. Sister

D. Daughter

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Correct Answer: Option B

Explanation:
D is the mother of B and C. A is father of B. Therefore D is the wife of A.

This question belongs to: Reasoning Mental Reasoning

Question #272

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Pointing to a boy, a man says, 'He is the son of my father's only daughter.' How is the boy related to the man?

A. Son

B. Brother

C. Cousin

D. Nephew

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Correct Answer: Option D

Explanation:
The father's only daughter is the man's sister. Her son is the man's nephew.

This question belongs to: Reasoning Mental Reasoning

Question #273

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If A + B means A is father of B and A × B means A is brother of B, then P + Q × R means:

A. P is father of R

B. P is brother of R

C. P is grandfather of R

D. P is uncle of R

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Correct Answer: Option A

Explanation:
P + Q means P is father of Q. Q × R means Q is brother of R. So P is also father of R.

This question belongs to: Reasoning Mental Reasoning

Question #274

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R is daughter of S. T is mother of S. U is father of T. How is R related to U?

A. Granddaughter

B. Daughter

C. Great-granddaughter

D. Niece

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Correct Answer: Option C

Explanation:
U is T's father, T is S's mother, and S is R's parent. So U is R's great-grandfather, making R his great-granddaughter.

This question belongs to: Reasoning Mental Reasoning

Question #275

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A is brother of B. C is father of A. D is mother of C. How is D related to B?

A. Sister

B. Grandmother

C. Aunt

D. Mother

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Correct Answer: Option B

Explanation:
C is B's father, and D is C's mother. Therefore D is B's grandmother.

This question belongs to: Reasoning Mental Reasoning

Question #276

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Pointing to a woman, a man said, 'Her father is the son-in-law of my mother.' How is the woman related to the man?

A. Cousin

B. Daughter

C. Niece

D. Sister

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Correct Answer: Option C

Explanation:
The son-in-law of the man's mother is the husband of the man's sister. His daughter is the man's niece.

This question belongs to: Reasoning Mental Reasoning

Question #277

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A man walks 3 km north, turns right and walks 4 km, then turns right and walks 3 km. How far is he from the starting point?

A. 7 km

B. 4 km

C. 3 km

D. 5 km

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Correct Answer: Option B

Explanation:
After walking north 3 km and later south 3 km, those cancel out. He is 4 km to the east of the starting point.

This question belongs to: Reasoning Mental Reasoning

Question #278

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A girl starts walking towards east. After 10 m she turns left and walks 10 m, then turns left and walks 10 m, then turns left and walks 10 m. How far is she from the starting point?

A. 10 m

B. 20 m

C. 30 m

D. 0 m

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Correct Answer: Option D

Explanation:
She completes a square path and returns to the starting point, so the distance is 0 m.

This question belongs to: Reasoning Mental Reasoning

Question #279

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Ravi went 15 km towards south, then turned left and went 20 km, then turned right and went 15 km. In which direction is he from the starting point?

A. East

B. South-East

C. South

D. South-West

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Correct Answer: Option B

Explanation:
He moves south 15 km, east 20 km, then south 15 km. His final position is to the south and east of the starting point, i.e. South-East.

This question belongs to: Reasoning Mental Reasoning

Question #280

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A man walks 4 km towards north, then turns right and walks 3 km. What is the shortest distance from the starting point?

A. 5 km

B. 8 km

C. 7 km

D. 6 km

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Correct Answer: Option A

Explanation:
The path forms a right-angled triangle with sides 4 km and 3 km. Shortest distance = √(4² + 3²) = √25 = 5 km.

This question belongs to: Reasoning Mental Reasoning

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