Understanding Coding Decoding Puzzles

This question is a classic example of a coding-decoding puzzle often found in reasoning sections of various exams. In such puzzles, words are coded into numbers or other words based on a specific rule or pattern. Our task is to identify this rule and apply it to a new word.

Identifying the Coding Rule

We are given two examples of words coded into numbers:

• WORLD is coded as 72
• WRITE is coded as 75

Let's try to relate the letters of the words to their corresponding numerical values in the English alphabet. The position of each letter is as follows:

Let's find the position values for the letters in WORLD:

• W: 23
• O: 15
• R: 18
• L: 12
• D: 4

Let's sum these position values:

\( 23 + 15 + 18 + 12 + 4 = 72 \)

This sum matches the given code for WORLD.

Now, let's do the same for WRITE:

• W: 23
• R: 18
• I: 9
• T: 20
• E: 5

Let's sum these position values:

\( 23 + 18 + 9 + 20 + 5 = 75 \)

This sum also matches the given code for WRITE.

The pattern is clear: the code for a word is the sum of the alphabetical position values of its letters.

Applying the Rule to GIRLS

Now we will apply this rule to find the code for GIRLS. First, find the position value for each letter in GIRLS:

• G: 7
• I: 9
• R: 18
• L: 12
• S: 19

Next, sum these position values:

\( 7 + 9 + 18 + 12 + 19 \)

Calculation:

\( 7 + 9 = 16 \)

\( 16 + 18 = 34 \)

\( 34 + 12 = 46 \)

\( 46 + 19 = 65 \)

So, GIRLS is coded as 65.

Conclusion

Based on the pattern identified, where the code is the sum of the alphabetical positions of the letters, the word GIRLS is coded as 65.

Revision Table: Coding Decoding Logic

Additional Information: Types of Coding Decoding

Coding-decoding problems can involve various patterns. Some common types include:

• Letter Coding: Letters are replaced by other letters. The pattern could be shifting letters forward or backward in the alphabet, reversing the word, or a combination.
• Number Coding: Words are coded into numbers. This can be based on letter positions (like in this problem), number of letters, vowel/consonant count, or other numerical relationships.
• Symbol Coding: Letters or words are coded using symbols.
• Mixed Coding: A combination of letter and number/symbol coding.

Solving these problems requires careful observation, testing potential rules, and applying logical deduction. Practicing with different types of problems helps in quickly identifying the underlying pattern.