# Coding and Decoding : Concepts & Tricks

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###### Introduction: coding decoding reasoning
Almost every test of reasoning contains questions on coding. In such questions, generally one word and its code are given, and the students are required to find the code for the other word. The student is required to apply the same logic, as was applied in the given words.
Let's discuss some of the commonly asked questions based on coding:
Some of the major types of coding logics are
1. Constant addition in the position of letters.
2. Constant subtraction in the position of letters.
3. Denoting the position of letters in the whole alphabetical order.
4. Addition of the positions of all the letters to make code for the word.
5. Constant addition and subtraction alternatively in the position of all the letters.
6. Square of the number of letters in the word.
7. Arranging the letters in the alphabetical order.
8. Arrangement of letters in the word given in reverse order.
9. Interchanging each pair of the letters, in the given word.
10. Constant addition and then reversal of the letters to form the final word.
Now we will discuss some of the important types of coding with the help of examples.
Note: It is advised that the student should learn the alphabetical order of all the letters.
###### Some important coding decoding tricks & tips
The following method can be employed to learn the alphabetical order.
###### THE ALPHABET & EJOTY CONCEPT:
There are exactly 26 letters in English alphabets.
A-Z- (1 to 26),
A-1,
B-2;
C-3,  … and so on.
We should learn numbering of every letter. So for better convenience, you can learn two words which help you to remember numbering of letters which are given below:
 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
• 5
• 10
• 15
• 20
• 25
• E
• J
• O
• T
• Y
Reverse EJOTY:
When we start count Alphabets from the Z to A, this is called reverse EJOTY.
It can be easily explained by an example given below:
Example:
If code for AYNA is ‘ZBMZ’, find the code for NUTS.
According to alphabet series, the position of A-1 , Y-25, N-14, A-1
In reverse EJOTY, Z-1, B-25, M- 14, Z-1
Or we can also say that,
• 1
• 25
• 14
• 1
• A
• Y
• N
• A
• +
• Z
• B
• M
• Z
• 26
• 2
• 13
• 26
Sum of every letter & its corresponding coded letter is 27. Therefore, code for NUTS is ‘MFGH’.
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