Reasoning

Letter Group Classification: Practice Questions with Answers

11 practice questions on Letter Group Classification, with answers; most also have an explanation or a worked solution. Try each one before you open its answer.

Read the lesson on this topic →

1. Q.1

   Find the odd one out: EHK, FIL, GJM, HKO

   Show answer

   Answer: HKO

   Solution:

   1. Position numbers and gaps: EHK (5,8,11 → +3,+3), FIL (6,9,12 → +3,+3), GJM (7,10,13 → +3,+3) — all share the pattern +3, +3.
   2. HKO (8,11,15 → +3,+4) — the second gap is +4, not +3, breaking the pattern.

   Report this question

2. Q.2

   Find the odd one out: CEH, FHK, LNQ, ILO

   Show answer

   Answer: ILO

   Solution:

   1. Position numbers and gaps: CEH (3,5,8 → +2,+3), FHK (6,8,11 → +2,+3), LNQ (12,14,17 → +2,+3) — all share the pattern +2, +3.
   2. ILO (9,12,15 → +3,+3) — both gaps are +3, not +2 then +3, breaking the pattern.

   Report this question

3. Q.3

   Find the odd one out: ADG, BEH, CFI, DGK

   Show answer

   Answer: DGK

   Solution:

   1. Position numbers and gaps: ADG (1,4,7 → +3,+3), BEH (2,5,8 → +3,+3), CFI (3,6,9 → +3,+3) — all share the pattern +3, +3.
   2. DGK (4,7,11 → +3,+4) — the second gap is +4, not +3, breaking the pattern.

   Report this question

4. Q.4

   Find the odd one out: ACE, GIK, MOQ, SVY

   Show answer

   Answer: SVY

   Solution:

   1. Position numbers and gaps: ACE (1,3,5 → +2,+2), GIK (7,9,11 → +2,+2), MOQ (13,15,17 → +2,+2) — all share the pattern +2, +2.
   2. SVY (19,22,25 → +3,+3) — both gaps are +3, not +2, breaking the pattern.

   Report this question

5. Q.5

   Find the odd one out: BDF, CEG, PRT, MOR

   Show answer

   Answer: MOR

   Solution:

   1. Position numbers and gaps: BDF (2,4,6 → +2,+2), CEG (3,5,7 → +2,+2), PRT (16,18,20 → +2,+2) — all share the pattern +2, +2.
   2. MOR (13,15,18 → +2,+3) — the second gap is +3, not +2, breaking the pattern.

   Report this question

6. Q.6

   Find the odd one out: TRP, QOM, NLJ, SQN

   Show answer

   Answer: SQN

   Solution:

   1. Position numbers and gaps (letters decreasing): TRP (20,18,16 → −2,−2), QOM (17,15,13 → −2,−2), NLJ (14,12,10 → −2,−2) — all share the pattern −2, −2.
   2. SQN (19,17,14 → −2,−3) — the second gap is −3, not −2, breaking the pattern.

   Report this question

7. Q.7

   Find the odd one out: PRT, QSU, RTV, TVY

   Show answer

   Answer: TVY

   Report this question

8. Q.8

   Find the odd one out: HKN, ILO, JMP, KNR

   Show answer

   Answer: KNR

   Report this question

9. Q.9

   Find the odd one out: TRP, SQO, RPN, QNL

   Show answer

   Answer: QNL (gaps −3,−2, while the others follow −2,−2)

   Report this question

10. Q.10

    Find the odd one out: BDF, DFH, FHJ, HJM

    Show answer

    Answer: HJM

    Report this question

11. Q.11

    Find the odd one out: ABD, DEG, GHJ, JLN

    Show answer

    Answer: JLN (gaps +2,+2, while the others follow +1,+2)

    Report this question

Practise this topic →