Mental Reasoning MCQs with Answers for JKSSB, SSC & Railway

Question #101

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Find the missing term: 100, 50, 25, 12.5, ?

A. 7.25

B. 6.25

C. 7.5

D. 6.5

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Correct Answer: Option B

Explanation:
Each term is divided by 2: 100÷2=50, 50÷2=25, 25÷2=12.5, so 12.5÷2=6.25.

This question belongs to: Reasoning Mental Reasoning

Question #102

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Find the missing term: 3, 6, 18, 72, ?

A. 432

B. 360

C. 288

D. 324

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Correct Answer: Option B

Explanation:
Multipliers are 2, 3, 4, 5: 3×2=6, 6×3=18, 18×4=72, so 72×5=360.

This question belongs to: Reasoning Mental Reasoning

Question #103

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Find the missing term: 1, 5, 14, 30, 55, ?

A. 95

B. 85

C. 89

D. 91

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Correct Answer: Option D

Explanation:
Differences are 4, 9, 16, 25, i.e., 2², 3², 4², 5²; next difference is 6²=36, so 55+36=91.

This question belongs to: Reasoning Mental Reasoning

Question #104

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Find the missing term: 2, 12, 30, 56, ?

A. 88

B. 84

C. 80

D. 90

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Correct Answer: Option D

Explanation:
The terms follow n²+n for odd n? Check: 1²+1=2, 3²+3=12, 5²+5=30, 7²+7=56, so next is 9²+9=90.

This question belongs to: Reasoning Mental Reasoning

Question #105

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Find the missing term: 11, 17, 23, 29, ?

A. 36

B. 34

C. 33

D. 35

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Correct Answer: Option D

Explanation:
Arithmetic progression with common difference 6: 29+6=35.

This question belongs to: Reasoning Mental Reasoning

Question #106

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Find the missing term: 7, 16, 29, 46, ?

A. 65

B. 61

C. 63

D. 67

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Correct Answer: Option D

Explanation:
Differences are +9, +13, +17, which increase by 4; next difference is +21, so 46+21=67.

This question belongs to: Reasoning Mental Reasoning

Question #107

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Find the missing term: 2, 3, 10, 39, ?

A. 160

B. 172

C. 168

D. 180

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Correct Answer: Option B

Explanation:
Pattern: ×1+1=3, ×2+4=10, ×3+9=39, so next is ×4+16=172.

This question belongs to: Reasoning Mental Reasoning

Question #108

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Find the missing term: 6, 13, 28, 59, ?

A. 120

B. 124

C. 122

D. 118

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Correct Answer: Option C

Explanation:
Pattern: 6×2+1=13, 13×2+2=28, 28×2+3=59, so next is 59×2+4=122.

This question belongs to: Reasoning Mental Reasoning

Question #109

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Find the missing term: 4, 12, 28, 60, ?

A. 120

B. 116

C. 124

D. 112

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Correct Answer: Option C

Explanation:
Each term is multiplied by 2 and 4 added: 4×2+4=12, 12×2+4=28, 28×2+4=60, so 60×2+4=124.

This question belongs to: Reasoning Mental Reasoning

Question #110

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Find the missing term: 1, 6, 15, 28, 45, ?

A. 64

B. 62

C. 66

D. 68

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Correct Answer: Option C

Explanation:
Differences are +5, +9, +13, +17, which increase by 4; next difference is +21, so 45+21=66.

This question belongs to: Reasoning Mental Reasoning

Question #111

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Find the missing term: 3, 6, 12, 24, 48, ?

A. 72

B. 108

C. 96

D. 84

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Correct Answer: Option C

Explanation:
Each term is multiplied by 2: 3×2=6, 6×2=12, 12×2=24, 24×2=48, so 48×2=96.

This question belongs to: Reasoning Mental Reasoning

Question #112

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Find the missing term: 2, 9, 28, 65, ?

A. 125

B. 124

C. 127

D. 126

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Correct Answer: Option D

Explanation:
The terms follow n³+1: 1³+1=2, 2³+1=9, 3³+1=28, 4³+1=65, so next is 5³+1=126.

This question belongs to: Reasoning Mental Reasoning

Question #113

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Find the missing term: 5, 25, 125, 625, ?

A. 3120

B. 3125

C. 3000

D. 2500

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Correct Answer: Option B

Explanation:
Each term is multiplied by 5: 5×5=25, 25×5=125, 125×5=625, so 625×5=3125.

This question belongs to: Reasoning Mental Reasoning

Question #114

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Find the missing term: 2, 3, 6, 11, 18, ?

A. 25

B. 28

C. 27

D. 26

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Correct Answer: Option C

Explanation:
Differences are +1, +3, +5, +7, so next difference is +9: 18+9=27.

This question belongs to: Reasoning Mental Reasoning

Question #115

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Find the missing term: 10, 20, 40, 80, 160, ?

A. 280

B. 300

C. 240

D. 320

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Correct Answer: Option D

Explanation:
Each term is multiplied by 2: 10×2=20, 20×2=40, 40×2=80, 80×2=160, so 160×2=320.

This question belongs to: Reasoning Mental Reasoning

Question #116

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Find the missing term: 1, 8, 27, 64, 125, ?

A. 216

B. 226

C. 206

D. 196

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Correct Answer: Option A

Explanation:
The terms are consecutive cubes: 1³, 2³, 3³, 4³, 5³, so next is 6³=216.

This question belongs to: Reasoning Mental Reasoning

Question #117

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In a certain code language, 'COMPUTER' is written as 'RFUVQNPC'. How will 'MEDICINE' be written in that code?

A. EOJDJEFM

B. MFEJDJOE

C. EOJDEJFM

D. MFEDJJOE

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Correct Answer: Option A

Explanation:
The letters are reversed and then each letter is increased by 1. COMPUTER reversed is RETUPMOC, then +1 gives RFUVQNPC. MEDICINE reversed is ENICIDEM, then +1 gives EOJDJEFM.

This question belongs to: Reasoning Mental Reasoning

Question #118

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If in a certain language, 'MADRAS' is coded as 'NBESBT', how is 'BOMBAY' coded in that language?

A. CPNCBX

B. CQOCBZ

C. CPOCBZ

D. CPNCBZ

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Correct Answer: Option D

Explanation:
Each letter is increased by 1. M→N, A→B, D→E, R→S, A→B, S→T. Similarly B→C, O→P, M→N, B→C, A→B, Y→Z. Thus BOMBAY becomes CPNCBZ.

This question belongs to: Reasoning Mental Reasoning

Question #119

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Find the odd one out: 3, 5, 11, 14, 17, 21

A. 17

B. 21

C. 3

D. 14

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Correct Answer: Option D

Explanation:
All numbers except 14 are prime numbers. 14 is composite. Hence 14 is the odd one out.

This question belongs to: Reasoning Mental Reasoning

Question #120

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If South-East becomes North, North-East becomes West and so on, what will West become?

A. North-West

B. North-East

C. South-East

D. South-West

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Correct Answer: Option C

Explanation:
The directions are rotated 135° anti-clockwise. South-East → North (135° ACW). North-East → West. East → North-West. West → South-East.

This question belongs to: Reasoning Mental Reasoning

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