Mental Reasoning MCQs with Answers for JKSSB, SSC & Railway

Question #181

Statements: Some books are novels. All novels are magazines. Conclusions: I. Some books are magazines. II. All magazines are novels.

A. Only II follows

B. Only I follows

C. Both follow

D. Neither follows

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Correct Answer: Option B

Explanation:
Some books are novels and all novels are magazines ⇒ Some books are magazines. All magazines are novels does not follow. Only I.

This question belongs to: Reasoning Mental Reasoning

Question #182

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A person walks 10 km towards North. From there he walks 6 km towards South. Then he walks 3 km towards East. How far and in which direction is he with reference to his starting point?

A. 5 km East

B. 7 km North-East

C. 5 km North-East

D. 7 km East

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Correct Answer: Option C

Explanation:
Net North =10-6=4 km North, 3 km East. Distance √(4²+3²)=5 km North-East.

This question belongs to: Reasoning Mental Reasoning

Question #183

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Find the odd one out: 8, 27, 64, 100, 125, 216, 343

A. 100

B. 125

C. 27

D. 343

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Correct Answer: Option A

Explanation:
All others are cubes (2³,3³,4³,5³,6³,7³) while 100 is not a cube.

This question belongs to: Reasoning Mental Reasoning

Question #184

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If P is the brother of Q, R is the sister of Q and S is the father of P, then how is R related to S?

A. Sister

B. Son

C. Daughter

D. Mother

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Correct Answer: Option C

Explanation:
S is father of P and Q (siblings), R is sister of Q so R is also child of S, hence daughter of S.

This question belongs to: Reasoning Mental Reasoning

Question #185

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In a certain code language, 'kew xas huma deko' means 'she is running there'; 'xas nuti muki' means 'is she?'; 'deko muki kasi' means 'there is a girl'. Which word in that language means 'girl'?

A. kasi

B. xas

C. deko

D. muki

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Correct Answer: Option A

Explanation:
From first and second, 'xas' = is or she. From second and third, 'muki' = is or there? First has 'kew xas huma deko' = she is running there. Second 'xas nuti muki' = is she? Third 'deko muki kasi' = there is a girl. Common first and third 'deko' = there. Common second and third 'muki' = is. Then from third remaining 'kasi' = girl (a is ignored or 'a' not coded).

This question belongs to: Reasoning Mental Reasoning

Question #186

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What is the next number in the series: 6, 11, 21, 40, 77, ?

A. 149

B. 152

C. 150

D. 151

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Correct Answer: Option A

Explanation:
Pattern: ×2 −1, ×2 −1, ×2 −2, ×2 −3, ×2 −5? 6×2−1=11, 11×2−1=21, 21×2−2=40, 40×2−3=77, 77×2−5=149 (subtracted numbers 1,1,2,3,5 Fibonacci).

This question belongs to: Reasoning Mental Reasoning

Question #187

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A, B, C, D, E and F are sitting in a circle facing the centre. A is between D and E. C is between B and F. Who is sitting to the immediate left of B if D is to the immediate left of C?

A. C

B. A

C. F

D. Cannot be determined

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Correct Answer: Option C

Explanation:
D left of C (facing centre, left is clockwise or depending convention). One possible: D C F B ... etc. Immediate left of B is F in valid arrangement.

This question belongs to: Reasoning Mental Reasoning

Question #188

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Statements: All cups are plates. Some plates are bowls. Conclusions: I. Some bowls are cups. II. Some plates are cups.

A. Neither follows

B. Both follow

C. Only I follows

D. Only II follows

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Correct Answer: Option D

Explanation:
All cups are plates ⇒ Some plates are cups. Some plates are bowls does not imply some bowls are cups. Only II.

This question belongs to: Reasoning Mental Reasoning

Question #189

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A man starts from a point, walks 4 km towards North, turns to his right and walks 2 km, turns to his right again and walks 4 km. In which direction is he from the starting point?

A. East

B. West

C. South

D. North

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Correct Answer: Option A

Explanation:
North 4, right (East) 2, right (South) 4. Ends 2 km East of start.

This question belongs to: Reasoning Mental Reasoning

Question #190

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Find the missing number: 5, 11, 24, 51, 106, ?

A. 215

B. 217

C. 219

D. 221

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Correct Answer: Option B

Explanation:
Pattern: ×2 +1, ×2 +2, ×2 +3, ×2 +4, ×2 +5: 5×2+1=11, 11×2+2=24, 24×2+3=51, 51×2+4=106, 106×2+5=217.

This question belongs to: Reasoning Mental Reasoning

Question #191

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If the first and second letters in the word 'COMMUNICATIONS' are interchanged, also the third and fourth letters, the fifth and sixth letters and so on, which letter would be the 10th letter counting from your right?

A. U

B. N

C. T

D. A

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Correct Answer: Option A

Explanation:
Word: C O M M U N I C A T I O N S. Interchange pairs: O C M M N U C I T A O I S N. From right: N S I O A T I C U N M M C O. 10th from right is U.

This question belongs to: Reasoning Mental Reasoning

Question #192

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How many meaningful English words can be formed with the letters of the word 'LAME' using each letter only once in each word?

A. None

B. Three

C. One

D. Two

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Correct Answer: Option B

Explanation:
Possible: LAME, MALE, MEAL, ALE M etc. Meaningful: LAME, MALE, MEAL. Three.

This question belongs to: Reasoning Mental Reasoning

Question #193

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Statements: Some sweets are salt. All salt are bitter. Conclusions: I. Some bitter are salt. II. Some bitter are sweets.

A. Both follow

B. Only I follows

C. Neither follows

D. Only II follows

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Correct Answer: Option A

Explanation:
All salt are bitter ⇒ Some bitter are salt. Some sweets are salt and all salt are bitter ⇒ Some sweets are bitter ⇒ Some bitter are sweets. Both.

This question belongs to: Reasoning Mental Reasoning

Question #194

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A is taller than B. C is taller than A. D is taller than E but shorter than B. Who is the tallest?

A. B

B. C

C. D

D. A

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Correct Answer: Option B

Explanation:
C > A > B > D > E. C is tallest.

This question belongs to: Reasoning Mental Reasoning

Question #195

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If in a certain code, '753' means 'books are old', '365' means 'old and rare' and '473' means 'books and pens', which digit stands for 'rare'?

A. 3

B. 6

C. 5

D. 7

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Correct Answer: Option B

Explanation:
From first and second, old =5 or 3. From first and third, books =7 or 3. Common analysis: first and second share 5 and 3, old common. Second and third share 3, but second has and rare old, third books and pens. 'and' common in second and third =3. Then from second, old and rare =3 6 5, and =3 so old/rare =6,5. From first, books are old =7 5 3, and =3 so books/are/old =7,5. Thus old =5, then rare =6.

This question belongs to: Reasoning Mental Reasoning

Question #196

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Find the next term in the series: 3, 4, 10, 33, 136, ?

A. 685

B. 700

C. 695

D. 690

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Correct Answer: Option A

Explanation:
Pattern: ×1+1, ×2+2, ×3+3, ×4+4, ×5+5: 3×1+1=4, 4×2+2=10, 10×3+3=33, 33×4+4=136, 136×5+5=685.

This question belongs to: Reasoning Mental Reasoning

Question #197

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Pointing to a girl, a man said, 'She is the daughter of the only child of my father.' How is the man related to the girl?

A. Father

B. Brother

C. Uncle

D. Grandfather

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Correct Answer: Option A

Explanation:
Only child of my father is the man himself. She is the daughter of the man. Hence father.

This question belongs to: Reasoning Mental Reasoning

Question #198

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In a certain code, 'COLLEGE' is written as 'DPMMFHF'. How is 'SCHOOL' written in that code?

A. TEIPPM

B. TDIPPM

C. TDHQPM

D. TDIPPL

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Correct Answer: Option B

Explanation:
Each letter +1: C→D, O→P, L→M, L→M, E→F, G→H, E→F. Similarly S→T, C→D, H→I, O→P, O→P, L→M. Thus TDIPPM.

This question belongs to: Reasoning Mental Reasoning

Question #199

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Statements: No flower is a tree. All trees are plants. Conclusions: I. No flower is a plant. II. Some plants are trees.

A. Neither follows

B. Only I follows

C. Only II follows

D. Both follow

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Correct Answer: Option C

Explanation:
No flower is tree and all trees are plants does not imply no flower is plant. Some plants are trees follows. Only II.

This question belongs to: Reasoning Mental Reasoning

Question #200

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A walks 10 metres in front and 10 metres to the right. Then every time turning to his left, he walks 5, 15 and 15 metres respectively. How far is he now from his starting point?

A. 15 metres

B. 5 metres

C. 10 metres

D. 20 metres

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Correct Answer: Option B

Explanation:
Assume start facing North 10 m. Right (East) 10 m. Left (North) 5 m. Left (West) 15 m. Left (South) 15 m. Net: North 10+5−15=0, East 10−15=−5 (5 m West). Distance 5 m.

This question belongs to: Reasoning Mental Reasoning

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