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Odd Man Out

Lesson 63 of 113

1. Ye topic hai kya?

4–6 cheezein di hain. Zyadatar ek hi khaas baat share karti hain. Jo ek is khaas baat se bahar hai, wahi odd man — usko tick.

Series se farq

Series mein poochhte hain agla kya. Yahan sequence aage nahi badhani. Set mein se kaun fit nahi.

Yahan kya nahi

Classification pehle class ka naam (dhatu, phool). Coding CAT→code alag. Shapes/mirror figures alag. Yahan leftover ki property.

2. Paper pe dimag kaise chale

Pehle majority ka rule, phir leftover:
1) Numbers? Prime / even / square / cube / ÷3
2) Letters? Vowel, +2 skip, opposite (A↔Z)
3) Words? Category — jaanwar, shehar, weekday
4) Pairs? a:b = square, ×2, reverse
5) Jo rule sirf ek ko bahar kare, wahi lo
Galati: ek item dekh ke “yeh alag lagta hai” tick. Pehle 3–4 pe common property lock, phir jo tootey woh odd.

3. Numbers

Sabse common: sab prime / sab even / sab square — ek nahi.

Basic · Prime

Q1. Odd man: 3, 5, 7, 9, 11

Solution shuru

  1. Step 1 — kya common ho sakta

    Odd numbers? Saare odd hain — koi bahar nahi. Rule fail.

  2. Step 2 — prime

    3, 5, 7, 11 prime. 9 = 3×3, prime nahi.

  3. Step 3 — ek hi leftover

    Sirf 9 toot-ta hai. Lock.

Final answer — yahan khatam9
Basic · Square

Q2. 16, 25, 36, 49, 64, 81, 99

Solution shuru

  1. Step 1

    4²=16, 5²=25, 6²=36, 7²=49, 8²=64, 9²=81. 10²=100, line mein 99.

  2. Step 2

    99 square nahi. Baaki sab hain.

Final answer — yahan khatam99
Medium · Cube

Q3. 8, 27, 64, 100, 125

Solution shuru

  1. Step 1

    2³=8, 3³=27, 4³=64, 5³=125. 100 = 10², cube nahi.

  2. Step 2 — even/square trap

    Agar “even” socho: 27,125 odd — do leftover. Odd-man mein rule ek ko kaate. Cube wahi karta hai.

Final answer — yahan khatam100

4. Letters aur letter-groups

Vowel, skip, opposite, consecutive block. Positions likho (A=1).

Basic · Vowel

Q4. A, E, I, O, B

Solution shuru

  1. Step 1

    A E I O vowels. B consonant.

  2. Step 2 — +4 skip?

    A→E +4, E→I +4, I→O +6 — skip constant nahi. Vowel rule saaf, ek leftover.

Final answer — yahan khatamB
Medium · Group skip

Q5. ACE, BDF, CEG, DEF

Solution shuru

  1. Step 1 — har group ke andar

    ACE: A +2 C +2 E. BDF: +2, +2. CEG: +2, +2. DEF: D +1 E +1 F.

  2. Step 2

    Teen groups skip-1 (ya +2). DEF consecutive, skip nahi. Odd = DEF.

Final answer — yahan khatamDEF
Medium · Opposite

Q6. AZ, BY, CX, DV

Solution shuru

  1. Step 1 — 27-pair

    A+Z=27, B+Y=27, C+X=27. D+V=4+22=26, nahi 27. D ka opposite W.

  2. Step 2

    Sirf DV toot-ta hai.

Final answer — yahan khatamDV

5. Words — category

Matlab se group: jaanwar, phal, shehar, weekday. Jo category se bahar, wahi odd. Extra knowledge kam — school-level category kaafi.

Basic · Category

Q7. Dog, Cat, Cow, Table

Solution shuru

  1. Step 1

    Dog, Cat, Cow — jaanwar. Table — furniture.

  2. Step 2 — 4 letters?

    Dog=3, Cat=3, Cow=3, Table=5. Bhi Table alag. Dono rules same leftover. Lock.

Final answer — yahan khatamTable
Medium · Place

Q8. Jaipur, Kota, Ajmer, Delhi

Solution shuru

  1. Step 1

    Jaipur, Kota, Ajmer — Rajasthan ke shehar. Delhi alag rajya / capital, Rajasthan nahi.

  2. Step 2 — “sab shehar”

    Delhi bhi shehar. Yeh rule kisi ko nahi kaatta. Isliye finer group: Rajasthan vs nahi.

Final answer — yahan khatamDelhi

Jo rule saare cover kare, woh odd nahi nikaalta. Thoda sakht category chahiye.

6. Pairs (a : b)

Har jodi ek relation. Jo relation tootey, woh odd.

Medium · Square pair

Q9. 2:4, 3:9, 4:16, 5:24

Solution shuru

  1. Step 1

    2²=4, 3²=9, 4²=16, 5²=25 — line mein 24.

  2. Step 2 — ×2?

    2:4 = ×2, 3:9 = ×3, alag-alag. Square teen jodi pe chalta, ek pe nahi.

Final answer — yahan khatam5:24

7. Do rules — kaun sa lo

Kabhi do properties dikhti hain. Jo exactly ek item kaate, wahi exam chahta hai. Jo do-teen ko kaate, galat.

Pro · Trap

Q10. 16, 25, 36, 72, 144

Solution shuru

  1. Step 1 — square try

    16, 25, 36 squares. 72 nahi. 144=12² square hai. Leftover sirf 72.

  2. Step 2 — ÷8 try

    16, 72, 144 ÷8. 25 aur 36 nahi — do leftover. Odd-man ke liye weak.

  3. Step 3

    Square rule ek ko kaatta hai. Answer 72.

Final answer — yahan khatam72

8. Pro checklist

  1. Pehle majority. “Mujhe yeh weird laga” last.
  2. Numbers: even → prime → square → cube → multiple.
  3. Letters: vowel → skip → opposite → consecutive group.
  4. Words: category. Spelling-count tab jab meaning se tie ho.
  5. Do leftover aayein to rule badlo.
  6. Series ka “next term” yahan mat nikaalo.

9. Practice — basic se pro, poora solution

Upar Q1–Q10 theory ke saath. Yahan Practice 1–10 alag. Format: sawaal → Solution shuru → steps → Final answer.

Basic

Practice 1. 2, 3, 5, 7, 11, 14, 17

Solution shuru

  1. Step 1 — majority

    2, 3, 5, 7, 11, 17 sab prime. 14 = 2×7, composite.

  2. Step 2 — doosra rule?

    Even leftover = sirf 2 aur 14 — do odd nahi, majority nahi. Odd leftover zyada items — galat. Prime lock.

Final answer — yahan khatam14
Basic

Practice 2. 8, 27, 64, 125, 216, 250

Solution shuru

  1. Step 1 — cubes

    2³=8, 3³=27, 4³=64, 5³=125, 6³=216. 7³=343. 250 cube nahi.

  2. Step 2

    Squares? 16, 25, 36… list match nahi. Cube majority.

Final answer — yahan khatam250
Basic

Practice 3. 121, 144, 169, 196, 200, 225

Solution shuru

  1. Step 1 — squares

    11²=121, 12²=144, 13²=169, 14²=196, 15²=225. 200 square nahi.

  2. Step 2

    +23, +25, +27, +4 — last gap toot. Cube 200 nahi. Square-chain lock, leftover 200.

Final answer — yahan khatam200
Basic

Practice 4. Mango, Apple, Banana, Potato

Solution shuru

  1. Step 1

    Mango, Apple, Banana — phal. Potato — sabzi / root.

Final answer — yahan khatamPotato
Medium

Practice 5. 24, 36, 48, 60, 72, 90

Solution shuru

  1. Step 1 — majority

    24, 36, 48, 60, 72 sab 12 se divide. 90/12 = 7.5, nahi.

  2. Step 2 — Q6 clone nahi

    AZ/BY opposite-letter alag. Square 90 nahi, lekin 36,48 square nahi — square majority fail. ÷12 lock.

Final answer — yahan khatam90
Medium

Practice 6. 7:49, 8:64, 9:81, 10:100, 11:131

Solution shuru

  1. Step 1

    7²=49 … 10²=100, 11²=121. Line mein 131.

Final answer — yahan khatam11:131
Medium

Practice 7. Jaisalmer, Jodhpur, Bikaner, Mumbai

Solution shuru

  1. Step 1

    Pehle teen Rajasthan. Mumbai Maharashtra.

Final answer — yahan khatamMumbai
Medium

Practice 8. ABC, DEF, GHI, JKM

Solution shuru

  1. Step 1

    ABC, DEF, GHI — teen consecutive letters. JKM: J, K, phir L skip M.

Final answer — yahan khatamJKM
Basic

Practice 9. Monday, Tuesday, Wednesday, January

Solution shuru

  1. Step 1

    Pehle teen weekday. January mahina.

Final answer — yahan khatamJanuary
Pro

Practice 10. 3, 5, 7, 12, 13

Solution shuru

  1. Step 1 — prime

    3, 5, 7, 13 prime. 12 nahi. Ek leftover.

  2. Step 2 — odd numbers

    12 even, baaki odd — yahi 12. Dono rules same answer.

  3. Step 3 — AP trap

    +2, +2, +5, +1 — series nahi banati. Odd-man series nahi hai. 12.

Final answer — yahan khatam12

10. Itna kaafi hai kya?

Agar tum:

  • majority ka rule pehle lock kar sako
  • prime / square / cube / vowel / opposite / category jaldi try kar sako
  • do leftover aaye to rule badal sako
  • series ka next yahan na nikaalo

to JA/CA-II ke odd-man sawaal basic se pro tak attempt ho sakte hain.

Agle topic: Coding-Decoding.

← Index · Letter Series · Reasoning · 4/Odd Man Out · RVUN JA/CA-II 2026