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DRDO CEPTAM Classification Questions with Answers & Explanations

20 Classification questions from the General Intelligence & Reasoning section of DRDO CEPTAM, 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: 36, 101, 42, 39

  1. A36
  2. B101
  3. C42
  4. D39
Show answer
Answer: (B) 101 All except 101 are multiples of 3.
Question 2

Find the odd one out: 154, 33, 121, 95

  1. A33
  2. B154
  3. C95
  4. D121
Show answer
Answer: (C) 95 All except 95 are multiples of 11.
Question 3

Find the odd one out: 139, 48, 60, 28

  1. A28
  2. B139
  3. C48
  4. D60
Show answer
Answer: (B) 139 All except 139 are multiples of 4.
Question 4

Find the odd one out: 45, 18, 24, 95

  1. A95
  2. B45
  3. C24
  4. D18
Show answer
Answer: (A) 95 All except 95 are multiples of 3.
Question 5

Find the odd one out: 48, 93, 42, 24

  1. A48
  2. B24
  3. C42
  4. D93
Show answer
Answer: (D) 93 All except 93 are multiples of 6.
Question 6

Find the odd one out: 28, 120, 84, 98

  1. A120
  2. B98
  3. C84
  4. D28
Show answer
Answer: (A) 120 All except 120 are multiples of 7.
Question 7

Find the odd one out: 55, 132, 154, 40

  1. A55
  2. B40
  3. C154
  4. D132
Show answer
Answer: (B) 40 All except 40 are multiples of 11.
Question 8

Find the odd one out: 24, 78, 87, 42

  1. A24
  2. B42
  3. C87
  4. D78
Show answer
Answer: (C) 87 All except 87 are multiples of 6.
Question 9

Find the odd one out: 78, 66, 137, 60

  1. A66
  2. B137
  3. C78
  4. D60
Show answer
Answer: (B) 137 All except 137 are multiples of 6.
Question 10

Find the odd one out: 56, 44, 50, 16

  1. A50
  2. B16
  3. C56
  4. D44
Show answer
Answer: (A) 50 All except 50 are multiples of 4.

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Question 11

Find the odd one out: 24, 48, 84, 68

  1. A84
  2. B24
  3. C48
  4. D68
Show answer
Answer: (D) 68 All except 68 are multiples of 6.
Question 12

Find the odd one out: 132, 111, 55, 77

  1. A111
  2. B132
  3. C55
  4. D77
Show answer
Answer: (A) 111 All except 111 are multiples of 11.
Question 13

Find the odd one out: 99, 72, 130, 81

  1. A99
  2. B72
  3. C81
  4. D130
Show answer
Answer: (D) 130 All except 130 are multiples of 9.
Question 14

Find the odd one out: 121, 24, 18, 33

  1. A121
  2. B24
  3. C18
  4. D33
Show answer
Answer: (A) 121 All except 121 are multiples of 3.
Question 15

Find the odd one out: 46, 63, 49, 84

  1. A46
  2. B63
  3. C49
  4. D84
Show answer
Answer: (A) 46 All except 46 are multiples of 7.
Question 16

Find the odd one out: 78, 72, 94, 30

  1. A72
  2. B78
  3. C30
  4. D94
Show answer
Answer: (D) 94 All except 94 are multiples of 6.
Question 17

Find the odd one out: 21, 110, 33, 18

  1. A110
  2. B21
  3. C18
  4. D33
Show answer
Answer: (A) 110 All except 110 are multiples of 3.
Question 18

Find the odd one out: 12, 52, 60, 101

  1. A60
  2. B52
  3. C12
  4. D101
Show answer
Answer: (D) 101 All except 101 are multiples of 4.
Question 19

Find the odd one out: 154, 146, 88, 99

  1. A99
  2. B88
  3. C146
  4. D154
Show answer
Answer: (C) 146 All except 146 are multiples of 11.
Question 20

Find the odd one out: 42, 146, 15, 27

  1. A42
  2. B15
  3. C146
  4. D27
Show answer
Answer: (C) 146 All except 146 are multiples of 3.

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

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