Verbal Reasoning by Dr. R S Aggarwal – Coding Decoding – Numerical coding decoding – Alphabet Coding.

Verbal Reasoning by Dr. R S Aggarwal – Coding Decoding – Numerical coding decoding – Alphabet Coding.

 Coding-Decoding – Verbal Reasoning (Dr. R.S. Aggarwal)

Coding-Decoding is a common topic in verbal reasoning, where a word, number, or sentence is transformed into a particular pattern. Your task is to find the logic behind the transformation and decode it.

 Types of Coding-Decoding Questions

 Alphabet Coding

In this type, each letter in a word is replaced by another letter based on a pattern.

Example 1:
 If CAT is coded as DBU, how is DOG coded?

Solution:

• C → D (+1), A → B (+1), T → U (+1)
• Following the same rule, DOG → EPH
  Answer: EPH

 Numerical Coding

Numbers are assigned to letters or words based on a pattern.

Example 2:
 If A = 1, B = 2, C = 3 and so on, what is the code for WORD?

Solution:

• W = 23, O = 15, R = 18, D = 4
  Answer: 23-15-18-4

 Letter to Number Coding

Each letter is replaced with a number based on its position in the alphabet.

Example 3:
 If SUN = 19 21 14, what is RAIN?

Solution:

• R = 18, A = 1, I = 9, N = 14
  Answer: 18 1 9 14

 Mixed Coding

Multiple words are coded together, and the pattern must be identified.

Example 4:
 If “Sky is blue” is coded as “1 2 3”, and “Blue is beautiful” is coded as “3 2 4”, what is the code for “Beautiful”?

Solution:

• “Blue” = 3, “is” = 2
• “Beautiful” = 4
  Answer: 4

 Important Tricks to Solve Coding-Decoding

Observe letter shifts (+1, -1, reverse order).
Convert letters to numbers (A=1, B=2, … Z=26).
Look for common patterns in multiple codes.
Practice frequently to recognize patterns quickly.

Would you like more practice questions or explanations for specific coding patterns?

Verbal Reasoning by Dr. R S Aggarwal – Coding Decoding – Numerical coding decoding – Alphabet Coding.

Here’s a complete and beginner-friendly explanation of Coding-Decoding (Numerical & Alphabet Coding) from Verbal Reasoning by Dr. R. S. Aggarwal, useful for competitive exams like SSC, Bank, Railway, and others:

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Coding-Decoding – Verbal Reasoning by Dr. R.S. Aggarwal

Topic: Numerical Coding & Alphabet Coding

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1. Alphabet Coding

Concept:

Each letter is assigned a numerical position based on its place in the English alphabet:

Letter	A	B	C	D	E	F	G	H	I	J	K	L	M
Number	1	2	3	4	5	6	7	8	9	10	11	12	13

Letter	N	O	P	Q	R	S	T	U	V	W	X	Y	Z
Number	14	15	16	17	18	19	20	21	22	23	24	25	26

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Example 1:

Q: If in a certain code, CAT = 3 1 20, then how is DOG coded?

Solution:
D = 4, O = 15, G = 7 →
Answer: 4 15 7

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2. Numerical Coding

In numerical coding, words are replaced by numbers based on a logical pattern or rule.

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Example 2:

Q: If PEN = 35, and INK = 34, find the code for PAPER.

Step-by-step:

Let’s assign values:
P = 16, A = 1, P = 16, E = 5, R = 18
Add them: 16 + 1 + 16 + 5 + 18 = 56
Answer: 56

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Common Patterns in Alphabet Coding

Pattern Type	Example	Explanation
Direct position	A=1, B=2, …, Z=26	Use alphabet number as-is
Reverse position	A=26, B=25, …, Z=1	Use opposite number
+/- Shifting	A → D (+3 shift)	Caesar Cipher-style shifting
Sum of positions	CAT → C(3)+A(1)+T(20)=24	Total of alphabet positions
Alternate letters	PICK → 16, 9, 3, 11	Write values of each letter separately
Pair coding	A → Z, B → Y (mirror coding)	Code using mirror image in alphabet

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Tip:

Use the ASCII trick if you’re comfortable with programming:

• ‘A’ = 65, ‘a’ = 97

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Practice Questions (Dr. R.S. Aggarwal Style)

Q1: If in a certain code, BALL = 24, how is CALL coded?

Solution:
B = 2, A = 1, L = 12, L = 12 → 2 + 1 + 12 + 12 = 27
C = 3, A = 1, L = 12, L = 12 → 3 + 1 + 12 + 12 = 28
Answer: 28

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Q2: If WORD = 23 15 18 4, how is CODE written?

C = 3, O = 15, D = 4, E = 5
Answer: 3 15 4 5

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Summary

Type	What it involves
Alphabet Coding	Letter to number based on position or shift
Numerical Coding	Word’s letter values added or transformed

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Would you like a PDF worksheet or practice mock test questions with answers on Coding-Decoding?

Verbal Reasoning by Dr. R S Aggarwal – Coding Decoding – Numerical coding decoding – Alphabet Coding.