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Coding-Decoding

Lesson 22 of 113

1. Ye topic hai kya?

Ek word (ya sentence) ko rule se code banaate hain. Tumhe rule dhundh ke doosra word code karna hai, ya code se word nikaalna.

Letter series se farq

Series: A, C, E, G — line aage. Coding: poora word CAT → DBU. Har letter pe rule.

Yahan kya nahi

Shapes / mirror alag. Clock alag. Yahan letters, numbers, chhoti language, rang-naam.

2. Paper pe dimag kaise chale

Diye hue word aur code ko letter-by-letter map karo:
1) Har letter +1 / −1 / +2?
2) Word ulta (reverse) to nahi?
3) Opposite (A↔Z, sum 27)?
4) Position numbers (A=1) ya unka sum?
5) Vowel alag, consonant alag?
6) Sentence coding: common words ka common code
Galati: pehla-aakhri letter dekh ke poora rule ghadna. Beech ke letters pe verify. Z+1 = A (wrap).

3. Har letter +n ya −n

Sabse common. CAT → DBU matlab har +1.

C3
+1
D4
A1
+1
B2
T20
+1
U21
Basic · +1

Q1. Agar CAT ko DBU likha jaye, to DOG ka code kya hai?

Solution shuru

  1. Step 1 — map

    C→D, A→B, T→U. Har letter +1.

  2. Step 2 — apply

    D+1=E, O+1=P, G+1=H.

Final answer — yahan khatamEPH
Basic · +1 word

Q2. Agar MADRAS ko NBESBT likha jaye, BOMBAY?

Solution shuru

  1. Step 1

    M→N, A→B, D→E, R→S, A→B, S→T. Sab +1. Reverse/jumble nahi.

  2. Step 2

    B→C, O→P, M→N, B→C, A→B, Y→Z.

Final answer — yahan khatamCPNCBZ
Medium · −1 + wrap

Q3. Agar DELHI ko CDKGH likha jaye, MUMBAI?

Solution shuru

  1. Step 1

    D→C, E→D, L→K, H→G, I→H. Har −1.

  2. Step 2

    M→L, U→T, M→L, B→A, A−1 = Z (wrap), I→H.

Final answer — yahan khatamLTLAZH

A se pehle Z. Z ke baad A. Circle.

4. Opposite aur reverse

Opposite: letter + pair = 27. A↔Z, B↔Y, M↔N. Reverse: word palat do, phir kabhi +1.

Medium · Opposite

Q4. Agar har letter ko uska opposite likha jaye, SUN ka code?

Solution shuru

  1. Step 1

    S=19, 27−19=8 = H. U=21, 27−21=6 = F. N=14, 27−14=13 = M.

Final answer — yahan khatamHFM
Medium · Reverse phir +1

Q5. Rule: pehle word ulta, phir har letter +1. RAM ka code?

Solution shuru

  1. Step 1 — reverse

    RAM → MAR.

  2. Step 2 — +1

    M→N, A→B, R→S.

Final answer — yahan khatamNBS

Order mat gadbad: pehle paltao, phir shift. Ulta kiya to galat word.

Medium · Vowel alag

Q6. Rule: consonant +1, vowel same. BALL ka code?

Solution shuru

  1. Step 1

    B consonant → C. A vowel → A. L → M. L → M.

Final answer — yahan khatamCAMM

5. Number coding

Letter ki position (A=1, Z=26), kabhi sum, kabhi word ke andar 1,2,3…

Basic · Position

Q7. Agar PAGE ko 16175 likha jaye (P=16, A=1, G=7, E=5), NOTE ka code?

Solution shuru

  1. Step 1

    Har letter ki position chipkao, beech mein dash nahi.

  2. Step 2

    N=14, O=15, T=20, E=5 → 1415205.

Final answer — yahan khatam1415205
Medium · Sum

Q8. Agar PEN = 35 (P=16, E=5, N=14; 16+5+14), BAT = ?

Solution shuru

  1. Step 1

    PEN sum check: 16+5+14=35. Theek.

  2. Step 2

    B=2, A=1, T=20. 2+1+20=23.

Final answer — yahan khatam23

6. Fictitious language (teen-teen words)

Do sentences. Jo word dono mein common, uska code bhi common. Baaki leftover map.

Pro · Language

Q9.

tok da pik = green is sweet

pik se tok = fruit is green

“fruit” ka code kya hai?

Solution shuru

  1. Step 1 — common codes

    Dono lines mein pik aur tok. Dono English mein common: is aur green.

  2. Step 2 — leftover

    Pehli line extra: da ↔ sweet. Doosri extra: se ↔ fruit.

  3. Step 3

    fruit = se. (pik/tok kaun sa green hai, is sawaal mein zaroori nahi.)

Final answer — yahan khatamse

Teesri sentence se pik vs tok alag ho jaata hai. Yahan poocha fruit — leftover kaafi.

7. “X is called Y”

Asli cheez ka naam badal diya. Sawaal poochhe asli rang/cheez, answer naya naam.

Pehle real-world fact (khoon laal). Phir table: laal ko kya bola jaata hai. Wahi tick.
Medium · Called as

Q10. White ko blue bola jata hai, blue ko red, red ko yellow. Khoon ka rang is code mein kya hai?

Solution shuru

  1. Step 1 — asli

    Khoon laal (red) hota hai. White/blue ki chain yahan kaam nahi.

  2. Step 2 — red ko kya bola

    Red is called yellow. Answer yellow.

  3. Step 3 — trap

    “Blue ko red” mat use karna — wo sky ke liye hota. Blood ke liye sirf red→yellow.

Final answer — yahan khatamyellow

8. Pro checklist

  1. Diya word aur code same length? Length alag to reverse+drop ya number-sum.
  2. Pehle +1/−1, phir reverse, phir opposite, phir vowel-split.
  3. Wrap: A−1=Z, Z+1=A.
  4. Language: Venn — common to common.
  5. Called-as: real fact pehle, rename baad.
  6. Do rules fit karein to jo saare letters pe chale.

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. Agar FISH ko GJTI likha jaye (har +1), DISH?

Solution shuru

  1. Step 1

    F→G, I→J, S→T, H→I. +1 confirm.

  2. Step 2

    D→E, I→J, S→T, H→I.

Final answer — yahan khatamEJTI
Basic

Practice 2. Rule: word reverse. BOY?

Solution shuru

  1. Step 1

    B-O-Y palat: Y-O-B.

Final answer — yahan khatamYOB
Medium

Practice 3. Opposite letters. CAT?

Solution shuru

  1. Step 1

    C↔X, A↔Z, T↔G (20, 27−20=7=G).

Final answer — yahan khatamXZG
Basic

Practice 4. Har letter −1. COLD?

Solution shuru

  1. Step 1

    C→B, O→N, L→K, D→C.

Final answer — yahan khatamBNKC
Medium

Practice 5. Reverse, phir +1. LIKE?

Solution shuru

  1. Step 1

    LIKE → EKIL.

  2. Step 2

    E→F, K→L, I→J, L→M.

Final answer — yahan khatamFLJM
Basic

Practice 6. Position chipkao. BAD?

Solution shuru

  1. Step 1

    B=2, A=1, D=4 → 214.

Final answer — yahan khatam214
Medium

Practice 7. Consonant +1, vowel same. ROSE?

Solution shuru

  1. Step 1

    R→S, O vowel→O, S→T, E vowel→E.

Final answer — yahan khatamSOTE
Pro

Practice 8.

na ja ko = red and blue

ja pe ko = blue is red

“and” ka code?

Solution shuru

  1. Step 1 — common

    Codes common: ja, ko. English common: red, blue. (and / is alag.)

  2. Step 2 — leftover

    Pehli extra: na ↔ and. Doosri extra: pe ↔ is.

Final answer — yahan khatamna
Medium

Practice 9. Blue ko green bola jata hai, green ko white, white ko yellow. Aasman ka rang is code mein?

Solution shuru

  1. Step 1 — asli

    Aasman neela (blue).

  2. Step 2

    Blue is called green. White/yellow mat chhoona.

Final answer — yahan khatamgreen
Pro

Practice 10. Agar PAPER ko 12314 is tarah code ho: P=1, A=2, E=3, R=4 (repeat letter same digit). PREP ka code?

Solution shuru

  1. Step 1 — map from PAPER

    P A P E R → 1 2 1 3 4. P dobara 1. A=2, E=3, R=4.

  2. Step 2 — PREP

    P=1, R=4, E=3, P=1 → 1431.

Final answer — yahan khatam1431

10. Itna kaafi hai kya?

Agar tum:

  • +1/−1, reverse, opposite teen pehle try kar sako
  • wrap (A↔Z) na bhoolo
  • language mein common-to-common kaat sako
  • called-as mein asli fact pehle rakh sako

to JA/CA-II ke coding-decoding basic se pro tak attempt ho sakte hain.

Agle topic: Shapes and Mirror Images.

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