Coding-Decodingकोडिंग-डिकोडिंग questions and answersप्रश्न और उत्तर

How coding-decoding worksकोडिंग-डिकोडिंग को समझिए

Write each letter’s alphabet position and compare it with its code letter. A constant shift (+2, −3) is the most common rule.

If the shift is not constant, check whether it grows (+1, +2, +3), alternates (+2, −2), or whether the code is reversed.

Memorise EJOTY (5, 10, 15, 20, 25) and opposite pairs (they add up to 27), so that no counting on fingers is needed.

Each trick says when to use it, why it works and when it fails. Formula tricks are checked by code over their whole range.हर ट्रिक बताती है कि उसे कब इस्तेमाल करें, वह क्यों काम करती है और कब नहीं। सूत्र वाली ट्रिक्स को कोड से उनकी पूरी रेंज पर जाँचा गया है।

Answers and full solutions are shown. Hide them to test yourself first.उत्तर और पूरे हल दिखाए गए हैं। पहले खुद को परखने के लिए इन्हें छिपाइए।

1. Example 1उदाहरण 1 · Coding-decoding (letter shift) · Easyआसान

   In a certain code language, RANCHI is written as UDQFKL. How is AGRA written in that code?

   1. DUJD
   2. XDOX
   3. DJUD
   4. EKVE
   Answer:उत्तर: DJUD

   1. RANCHI: R→U (+3), A→D (+3), N→Q (+3), C→F (+3), H→K (+3), I→L (+3).
   2. Rule: each letter moves +3.
   3. AGRA: A→D, G→J, R→U, A→D → DJUD.

2. Example 2उदाहरण 2 · Coding-decoding (letter shift) · Mediumमध्यम

   In a certain code language, JAIPUR is written as OFNUZW. How is NAGPUR written in that code?

   1. TGMVAX
   2. SFLUZW
   3. IVBKPM
   4. WZULFS
   Answer:उत्तर: SFLUZW

   1. JAIPUR: J→O (+5), A→F (+5), I→N (+5), P→U (+5), U→Z (+5), R→W (+5).
   2. Rule: each letter moves +5.
   3. NAGPUR: N→S, A→F, G→L, P→U, U→Z, R→W → SFLUZW.

3. Example 3उदाहरण 3 · Coding-decoding (letter shift) · Hardकठिन

   In a certain code language, NAGPUR is written as PDKUAY. How is SURAT written in that code?

   1. VYWGA
   2. QRNVN
   3. UXVFZ
   4. ZFVXU
   Answer:उत्तर: UXVFZ

   1. NAGPUR: N→P (+2), A→D (+3), G→K (+4), P→U (+5), U→A (+6), R→Y (+7).
   2. Rule: the 1st letter moves +2, the 2nd +3, the 3rd +4, and so on.
   3. SURAT: S→U, U→X, R→V, A→F, T→Z → UXVFZ.

4. Example 4उदाहरण 4 · Coding-decoding (letter shift) · Mediumमध्यम

   In a certain code language, SHIMLA is written as WHIEDO. How is DELHI written in that code?

   1. MLPIH
   2. ZAHDE
   3. EDHAZ
   4. FEIBA
   Answer:उत्तर: EDHAZ

   1. SHIMLA: S→O (−4), H→D (−4), I→E (−4), M→I (−4), L→H (−4), A→W (−4), then the result is reversed.
   2. Rule: each letter moves −4 and the word is written in reverse.
   3. DELHI: D→Z, E→A, L→H, H→D, I→E, then reverse → EDHAZ.

5. Example 5उदाहरण 5 · Coding-decoding (letter shift) · Mediumमध्यम

   In a certain code language, BANK is written as HKXY. How is DELHI written in that code?

   1. ABIEF
   2. LKOHG
   3. FEIBA
   4. GFJCB
   Answer:उत्तर: FEIBA

   1. BANK: B→Y (−3), A→X (−3), N→K (−3), K→H (−3), then the result is reversed.
   2. Rule: each letter moves −3 and the word is written in reverse.
   3. DELHI: D→A, E→B, L→I, H→E, I→F, then reverse → FEIBA.

6. Example 6उदाहरण 6 · Coding-decoding (letter shift) · Mediumमध्यम

   In a certain code language, PATNA is written as FSYFU. How is SURAT written in that code?

   1. XZWFY
   2. OVMPN
   3. YFWZX
   4. ZGXAY
   Answer:उत्तर: YFWZX

   1. PATNA: P→U (+5), A→F (+5), T→Y (+5), N→S (+5), A→F (+5), then the result is reversed.
   2. Rule: each letter moves +5 and the word is written in reverse.
   3. SURAT: S→X, U→Z, R→W, A→F, T→Y, then reverse → YFWZX.

Common mistakesआम गलतियाँ

• Wrapping around the alphabet incorrectly (Z + 1 = A).
• Missing that the code is written in reverse.

Frequently asked questionsअक्सर पूछे जाने वाले प्रश्न