Classification Rules
Classification Rules – 30-Minute Revision Sheet 🚂
Definition: Arranging items/words/numbers in a logical order or grouping based on common property.
🔑 Golden Rules (Bullet Proof)
- Rule-1: Always spot the “odd-one-out” property first – Vowel/Consonant, Odd/Even, Prime/Composite, Shape, Size, Direction, Material, Use.
- Rule-2: Number series → Check Difference → Ratio → Square/Cube → Prime → Fibonacci → Alternate.
- Rule-3: Alphabet series → Forward/Reverse, Vowel-count, GAP rule (EJOTY for 5-10-15-20-25), Reverse EJOTY (VQLGB).
- Rule-4: Word classification → Synonym > Antonym > Gender > Degree > Part-of-speech > Use > Material.
- Rule-5: Letter-group → Same-gap (ACE), Reverse-gap (ZXV), Vowel-insert (ABC-E), Consonant-cluster (BCD).
- Rule-6: Mixed series → Alpha-numeric-symbol → treat each slot separately; apply above rules slot-wise.
- Rule-7: Figure/Shape → Sides, Arrow direction, Rotation (CW/ACW), Mirror/Water image, Closed/Open, Shaded/Un-shaded.
- Rule-8: Always eliminate 2 options first → 50 % chance jumps to 50 % accuracy.
🧠 Mnemonics
- EJOTY → Every Jack Ordered Ten Yams (5-10-15-20-25).
- VQLGB → Very Quiet Little Girl Bought (reverse EJOTY for 22-17-12-7-2).
- PRIME 4-STEP → 2-3-5-7-11-13-17-19-23-29-31-37-41-43-47 (read as 4 rows of 4 digits).
- ODD-EVEN TOUCH → Last digit 0-2-4-6-8 → Even; 1-3-5-7-9 → Odd (faster than full division).
📊 Quick-Compare Tables
| Series Type | Check Order | Fast Trick |
|---|---|---|
| Number | Difference → Ratio → Square | 2-level diff gives 80 % answers |
| Alphabet | Forward/Reverse gap | EJOTY & VQLGB |
| Letter-cluster | Uniform gap | Write positions below, gap must be constant |
| Word | Synonym first | Hindi meaning in mind in 2 s |
| Figure | Sides → Rotation → Shading | Count sides first, rotation 45°/90° |
⚡ 60-Second Cheat Map
- Prime > 50 → 53-59-61-67-71-73-79-83-89-97
- Squares 1-25 → 1-4-9-16-25-36-49-64-81-100-121-144-169-196-225-256-289-324-361-400-441-484-529-576-625
- Cubes 1-12 → 1-8-27-64-125-216-343-512-729-1000-1331-1728
- Alphabet positions → A(1) E(5) I(9) O(15) U(21) → vowel gap +4,+4,+6,+6
- Reverse alphabet → A(1) ↔ Z(26), B(2) ↔ Y(25)… sum = 27 (always)
🔫 Rapid-Fire MCQs (Do in 60 s)
- Find the odd one out:
A) 144 B) 121 C) 169 D) 181 - Find the odd pair:
A) ACE : BDF B) QSU : RTV C) HJL : IKM D) BCD : CDE - Next number: 3, 8, 18, 38, ?
A) 78 B) 76 C) 74 D) 80 - Odd letter-group:
A) AEG B) IMQ C) BFJ D) MQS - Odd word:
A) Knife B) Sword C) Razor D) Blade - Missing term: 2, 3, 5, 7, 11, ?
A) 12 B) 13 C) 14 D) 15 - Odd figure:
(Assume option shapes: Triangle, Square, Circle, Rectangle → one is 3-sided, others 4)
A) Triangle - Next letter-cluster: AZ, BY, CX, ?
A) DW B) DX C) DY D) DV - Odd number pair:
A) 14-196 B) 16-256 C) 18-324 D) 20-400 - If 26419 is coded as 37530, then 8517 = ?
A) 9628 B) 0739 C) 9629 D) 0738
BETA
