← General Intelligence and Reasoning

Classification — Questions with Solutions

15 solved Classification questions from General Intelligence and Reasoning, as asked in SSC CGL and other SSC exams. Read the answer and explanation below, then practise the full set in the practice section.

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Q1. Three of the following four options are alike in a certain way and thus form a group. Which is the option that does NOT belong to that group? 1. $2-4-8$, 2. $2-2-4$, 3. $3-2-5$, 4. $1-3-3$

निम्नलिखित चार विकल्पों में से तीन एक निश्चित तरीके से समान हैं। वह विकल्प कौन सा है जो उस समूह से संबंधित नहीं है? 1. $2-4-8$, 2. $2-2-4$, 3. $3-2-5$, 4. $1-3-3$

  1. A. $2-4-8$
  2. B. $2-2-4$
  3. C. $3-2-5$
  4. D. $1-3-3$

Solution

The logic is: $\text{First number} \times \text{Second number} = \text{Third number}$. $2 \times 4 = 8$; $2 \times 2 = 4$; $1 \times 3 = 3$. But $3 \times 2 \neq 5$. Option 3 is odd.

Q2. Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the one that is different. 1. LQV, 2. DIN, 3. PTX, 4. AFK

चार अक्षर-समूह दिए गए हैं, जिनमें से तीन किसी तरह समान हैं और एक भिन्न है। भिन्न का चयन करें। 1. LQV, 2. DIN, 3. PTX, 4. AFK

  1. A. LQV
  2. B. DIN
  3. C. PTX
  4. D. AFK

Solution

Difference between consecutive letters: LQV (+5, +5), DIN (+5, +5), AFK (+5, +5). PTX is (+4, +4). So, PTX is odd.

Q3. Find the odd one out. Sodium, Calcium, Iron, Oxygen

बेजोड़ (Odd one) ज्ञात कीजिए। सोडियम, कैल्शियम, आयरन, ऑक्सीजन

  1. A. Sodium
  2. B. Oxygen
  3. C. Iron
  4. D. Calcium

Solution

Sodium, Calcium, and Iron are metals. Oxygen is a non-metal (gas).

Q4. Identify the group that does NOT follow the same pattern.

उस समूह की पहचान करें जो समान पैटर्न का पालन नहीं करता है।

  1. A. A3: C9
  2. B. B4: D16
  3. C. C5: E25
  4. D. D6: F30

Solution

Pattern: Letter +2, and the number is squared. $3^2=9$, $4^2=16$, $5^2=25$. For D6, $6^2$ should be 36, but it is given as F30.

Q5. Find the odd one out: Copper, Iron, Gold, Plastic

बेजोड़ ज्ञात कीजिए: तांबा, लोहा, सोना, प्लास्टिक

  1. A. Copper
  2. B. Iron
  3. C. Gold
  4. D. Plastic

Solution

Copper, Iron, and Gold are metals, whereas Plastic is a non-metal.

Q6. Identify the group that does NOT follow the same pattern.

उस समूह की पहचान करें जो समान पैटर्न का पालन नहीं करता है।

  1. A. A3: C9
  2. B. B4: D16
  3. C. C5: E25
  4. D. D6: F30

Solution

Pattern: Letter +2, and the number is squared. $3^2=9$, $4^2=16$, $5^2=25$. For D6, $6^2$ should be 36, but it is given as F30.

Q7. Find the odd word out from the given alternatives.

दिए गए विकल्पों में से विषम शब्द ज्ञात कीजिए।

  1. A. Guitar
  2. B. Flute
  3. C. Sitar
  4. D. Violin

Solution

All except Flute are stringed musical instruments. Flute is a wind instrument.

Q8. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.

चार संख्या-युग्म दिए गए हैं, जिनमें से तीन किसी प्रकार से समान हैं और एक अलग है। उस संख्या-युग्म का चयन करें जो अलग है।

  1. A. 144
  2. B. 169
  3. C. 196
  4. D. 224

Solution

144 ($12^2$), 169 ($13^2$), and 196 ($14^2$) are perfect squares. 224 is not a perfect square.

Q9. Three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which is the letter-cluster pair that does NOT belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their positions in the letter-cluster.)

  1. A. EJ-OT
  2. B. PF-OI
  3. C. KP-UZ
  4. D. CH-MR

Solution

In options 1, 3, and 4, the difference between the first letters and second letters of the pairs follows a specific positional jump pattern (+10 shift: E+10=O, J+10=T; K+10=U, P+10=Z; C+10=M, H+10=R). PF-OI does not follow this +10 shift pattern.

Q10. The same operation(s) are followed in all the given number pairs except one. Find that odd number pair. 1. 12:39, 2. 15:48, 3. 11:35, 4. 13:42

  1. A. 12:39
  2. B. 15:48
  3. C. 11:35
  4. D. 13:42

Solution

The pattern is Second number = (First number * 3) + 3. For 12: 12*3+3=39. For 15: 15*3+3=48. For 13: 13*3+3=42. But for 11: 11*3+3 = 36 (not 35). Thus, 11:35 is the odd one out.

Q11. Choose the odd one:

असंगत का चयन कीजिए:

  1. A. Mon Feb 04 2008
  2. B. Tue Mar 09 2027
  3. C. Fri May 25 0125
  4. D. Thu Apr 16 1936

Solution

Option 3 does not follow the standard leap year or consistent calendar timeline rules applied in the test context.

Q12. In each of the following questions, a group of three numbers/symbols is given in each option. Identify the group that does NOT follow the same pattern as the others.

निम्नलिखित प्रत्येक प्रश्न में, प्रत्येक विकल्प में तीन संख्याओं/प्रतीकों का एक समूह दिया गया है। उस समूह की पहचान कीजिए जो अन्य के समान पैटर्न का अनुसरण नहीं करता है।

  1. A. M13: J10: G7
  2. B. Z26: W23: T20
  3. C. D4: A1: X24
  4. D. H8: E6: B4

Solution

Letters decrease by 3 positions and correspond to their ranks. In option 4, H(8) to E(5) is a drop of 3 but it incorrectly writes E6 instead of E5.

Q13. In each of the following questions, a group of three numbers/symbols is given in each option. Identify the group that does NOT follow the same pattern as the others.

निम्नलिखित प्रत्येक प्रश्न में, प्रत्येक विकल्प में तीन संख्याओं/प्रतीकों का एक समूह दिया गया है। उस समूह की पहचान कीजिए जो अन्य के समान पैटर्न का अनुसरण नहीं करता है।

  1. A. Z1$:Y2#:X3@
  2. B. W4%: V5^: U6&
  3. C. T7*: S8(: R9)
  4. D. Q10$: P11$: O12$

Solution

Option 4 repeats the '$' symbol instead of shifting through unique logical symbols sequentially like the other options.

Q14. In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. In three of the four pairs, the same pattern is applied and hence they form a group. Select the number-pair that DOES NOT belong to this group.

  1. A. 335-119
  2. B. 358-152
  3. C. 317-101
  4. D. 308-92

Solution

Pattern: (First number / 3) + something. Wait, (335 - 119) = 216. (317 - 101) = 216. (308 - 92) = 216. But (358 - 152) = 206. So option 2 is the odd one out because the difference is not 216.

Q15. The question contains pairs of words that are related to each other in a certain way. Three of the following four word pairs are alike as these have the same relationship and thus form a group. Which word pair is the one that DOES NOT belong to that group?

  1. A. Triangle - 3 sides
  2. B. Pentagon - 5 sides
  3. C. Square - 4 sides
  4. D. Hexagon - 8 sides

Solution

A hexagon has 6 sides, not 8. An octagon has 8 sides. Thus, this pair is incorrect.