Decoding REWARI: Finding the Pattern

The question asks us to find the code for the word SIRSA based on the coding pattern used for the word REWARI. The word REWARI is coded as 185231189. We need to analyze the relationship between the letters in REWARI and the numbers in its code to figure out the rule.

Let's look at the letters in REWARI and their corresponding positions in the English alphabet:

• R is the 18th letter.
• E is the 5th letter.
• W is the 23rd letter.
• A is the 1st letter.
• R is the 18th letter.
• I is the 9th letter.

Now, let's compare these alphabetical positions with the given code 185231189:

• R (18) corresponds to 18
• E (5) corresponds to 5
• W (23) corresponds to 23
• A (1) corresponds to 1
• R (18) corresponds to 18
• I (9) corresponds to 9

It appears the code for REWARI is formed by simply writing down the alphabetical position of each letter in sequence. The number for each letter is placed next to the number for the previous letter without any separation.

Applying the Coding Rule to SIRSA

Now that we've identified the coding rule (using alphabetical position), we can apply it to the word SIRSA to find its code.

Let's find the alphabetical position for each letter in SIRSA:

• S is the 19th letter.
• I is the 9th letter.
• R is the 18th letter.
• S is the 19th letter.
• A is the 1st letter.

Now, we concatenate these numbers in the order they appear in the word SIRSA:

Code for S: 19

Code for I: 9

Code for R: 18

Code for S: 19

Code for A: 1

Putting these together, we get: 19918191.

Verification with Options

Let's compare our derived code (19918191) with the given options:

Our derived code, 19918191, matches Option 4.

Step-by-Step Coding Process for SIRSA

1. Identify the word to be coded: SIRSA.
2. Break down the word into individual letters: S, I, R, S, A.
3. Find the alphabetical position of each letter: S=19, I=9, R=18, S=19, A=1.
4. Concatenate the numerical positions in order: 19 followed by 9, followed by 18, followed by 19, followed by 1.
5. The resulting code is 19918191.

Revision Table: Understanding Letter Coding

This table helps visualize the simple letter-to-number mapping used in this type of coding problem.

Additional Information: Letter and Number Coding Concepts

Letter and number coding questions are common in reasoning ability tests. They involve finding a pattern or rule that converts letters of a word into a sequence of numbers, or vice versa. The most basic and frequent pattern involves using the alphabetical position of letters (A=1, B=2, ..., Z=26).

Other common patterns include:

• Positional value from the end of the alphabet (A=26, B=25, ... Z=1).
• Assigning codes based on vowels and consonants.
• Simple arithmetic operations on the positional values (e.g., adding a constant, multiplying, squaring).
• Patterns based on specific groups of letters.

Solving these problems requires careful observation, comparing the given word and its code, and systematically testing possible rules, starting with the simplest ones like alphabetical position.