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GATE Classification Questions with Answers & Explanations

16 Classification questions from the General Aptitude (Quantitative & Reasoning) section of GATE, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.

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Question 1

Find the odd one out: 18, 32, 33, 21

  1. A21
  2. B32
  3. C18
  4. D33
Show answer
Answer: (B) 32 All except 32 are multiples of 3.
Question 2

Find the odd one out: 18, 107, 24, 42

  1. A18
  2. B24
  3. C42
  4. D107
Show answer
Answer: (D) 107 All except 107 are multiples of 6.
Question 3

Find the odd one out: 24, 78, 84, 68

  1. A84
  2. B78
  3. C24
  4. D68
Show answer
Answer: (D) 68 All except 68 are multiples of 6.
Question 4

Find the odd one out: 84, 44, 18, 60

  1. A18
  2. B44
  3. C60
  4. D84
Show answer
Answer: (B) 44 All except 44 are multiples of 6.
Question 5

Find the odd one out: 110, 18, 72, 30

  1. A18
  2. B72
  3. C30
  4. D110
Show answer
Answer: (D) 110 All except 110 are multiples of 6.
Question 6

Find the odd one out: 40, 56, 57, 32

  1. A40
  2. B56
  3. C57
  4. D32
Show answer
Answer: (C) 57 All except 57 are multiples of 4.
Question 7

Find the odd one out: 125, 90, 36, 126

  1. A125
  2. B36
  3. C90
  4. D126
Show answer
Answer: (A) 125 All except 125 are multiples of 9.
Question 8

Find the odd one out: 65, 105, 28, 98

  1. A65
  2. B28
  3. C105
  4. D98
Show answer
Answer: (A) 65 All except 65 are multiples of 7.
Question 9

Find the odd one out: 36, 12, 40, 119

  1. A12
  2. B36
  3. C40
  4. D119
Show answer
Answer: (D) 119 All except 119 are multiples of 4.
Question 10

Find the odd one out: 36, 30, 56, 24

  1. A30
  2. B56
  3. C24
  4. D36
Show answer
Answer: (B) 56 All except 56 are multiples of 3.

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Question 11

Find the odd one out: 84, 48, 119, 24

  1. A119
  2. B84
  3. C48
  4. D24
Show answer
Answer: (A) 119 All except 119 are multiples of 6.
Question 12

Find the odd one out: 18, 141, 54, 48

  1. A18
  2. B48
  3. C141
  4. D54
Show answer
Answer: (C) 141 All except 141 are multiples of 6.
Question 13

Find the odd one out: 27, 143, 33, 30

  1. A27
  2. B30
  3. C33
  4. D143
Show answer
Answer: (D) 143 All except 143 are multiples of 3.
Question 14

Find the odd one out: 18, 21, 148, 39

  1. A39
  2. B148
  3. C18
  4. D21
Show answer
Answer: (B) 148 All except 148 are multiples of 3.
Question 15

Find the odd one out: 55, 147, 33, 165

  1. A33
  2. B147
  3. C165
  4. D55
Show answer
Answer: (B) 147 All except 147 are multiples of 11.
Question 16

Find the odd one out: 81, 28, 77, 56

  1. A28
  2. B81
  3. C77
  4. D56
Show answer
Answer: (B) 81 All except 81 are multiples of 7.

These are RankerClub practice questions written in the GATE pattern. They are not official SSC/IBPS/RRB papers.

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