Understanding the Coding Decoding Logic

This question is based on coding-decoding, a common type of logical reasoning problem. We are given two examples of words coded into a new form, and we need to find the pattern or rule used for coding. Once the rule is identified, we apply it to a new word to find its coded form.

Analyzing the Given Examples

Let's examine the first pair of words:

• Original Word: BANYAN
• Coded Word: EDQBDQ

Let's look at the transformation of each letter:

• B to E
• A to D
• N to Q
• Y to B
• A to D
• N to Q

Now, let's consider the position of these letters in the English alphabet (A=1, B=2, ..., Z=26):

It appears that each letter in the original word is shifted forward by 3 positions in the alphabet to get the coded letter. The shift wraps around from Z to A.

Let's verify this rule with the second pair of words:

• Original Word: LAUNCH
• Coded Word: ODXQFK

Applying the "+3 shift" rule:

• L (12) + 3 = O (15) - Correct
• A (1) + 3 = D (4) - Correct
• U (21) + 3 = X (24) - Correct
• N (14) + 3 = Q (17) - Correct
• C (3) + 3 = F (6) - Correct
• H (8) + 3 = K (11) - Correct

The rule is consistent: each letter is shifted forward by 3 positions in the alphabet.

Applying the Rule to 'STRIKER'

Now we will apply the same "+3 shift" rule to the word 'STRIKER'.

• S: S is the 19th letter. 19 + 3 = 22. The 22nd letter is V.
• T: T is the 20th letter. 20 + 3 = 23. The 23rd letter is W.
• R: R is the 18th letter. 18 + 3 = 21. The 21st letter is U.
• I: I is the 9th letter. 9 + 3 = 12. The 12th letter is L.
• K: K is the 11th letter. 11 + 3 = 14. The 14th letter is N.
• E: E is the 5th letter. 5 + 3 = 8. The 8th letter is H.
• R: R is the 18th letter. 18 + 3 = 21. The 21st letter is U.

So, 'STRIKER' is coded as 'VWULNHU'.

Comparing with Options

Let's compare our result with the given options:

1. VWULNHU
2. SCFIRET
3. ELBURPT
4. UNDARSA

Our calculated coded word 'VWULNHU' matches the first option.

Revision Table: Coding Logic Summary

Additional Information: Types of Letter Coding

Coding-decoding questions often involve rules related to letters. Some common types of letter coding include:

• Shift Coding: Each letter is shifted a fixed number of positions forward or backward in the alphabet. (This is the type used in this question).
• Reverse Order Coding: The letters of the word are reversed.
• Direct Letter Coding: Each letter is assigned a specific code letter, and the mapping is fixed.
• Positional Value Coding: The code is based on the alphabetical position of letters.
• Mixed Coding: A combination of different rules.

To solve these questions, it's important to carefully observe the patterns in the given examples, such as letter shifts, letter positions, or specific letter substitutions.