Dear Reader, we posted part 1 of coding and decoding problems a few days back. Here is your part 2 with more types of problems.
Type I: Coding Using Digits
In this type, coding is done using numbers/digits. Based on the question data, you have to identify digits/numbers representing each letter/word. Below example will help you to understand this type.
Example Question 1: In a certain code language “158” means “How are you”, “316” means “All are fine”, “516” means “Are you fine”. What is the code for “How”?
Solution:
“1 5 8” – “How are you” ….(1)
“3 1 6” – “All are fine” ….(2)
“5 1 6” – “Are you fine” ….(3)
In (1) and (2), only word that occur in both the equations is “are”. And only code that occur in both is “1”.
Therefore, “1” – “are”.
In (2) and (3), the words “are” and “fine” occur in both. Also the codes “1” and “6” occur in both. But we have already found “1” denotes “are”.
Therefore, you can conclude “6” – “fine”.
In (1) and (3), the words “are” and “you” occur in both. Similarly the codes “1” and “5” occur in both. But we already know “1” denotes “are”.
Therefore, you can conclude “5” – “you”.
In equation (1), now we know “5” denotes “you” and “1” denotes “are”.
Therefore, “8” should denote “How”.
Type II: Coding Based on Meanings
In this type, coding scheme will be based on the meanings of the words. Below is an example.
Example Question 2: If sugar is called white, white is called milk, milk is called butter, butter is called jam and jam is called food, then what is used for toasting bread?
Solution:
Butter is used to toast bread. Here butter is called (coded) as jam. So jam is used to toast the bread.
Type III: Coding Based on Symbols
Example Question 3: In a certain code language CAR is written as @#% and RAN is written as &#$. How will CAN be written in that language?
Solution:
First, you have to match the symbols with corresponding letters.
The code symbol table for CAR:
| C | A | R |
| @ | # | % |
The code symbol table for RAN:
| R | A | N |
| & | # | $ |
Based on the above two tables, you can easily write the code for CAN as shown below.
| C | A | N |
| @ | # | $ |
If you want clarification for any doubts, please use the comments section below. Also please let us know if you have suggestions or corrections.