Coding and Decoding

Coding is a process used to encrypt a word, a number in a particular code or pattern based on some set of rules.

Decoding is a process to decrypt the pattern into its original form from the given codes.

Letter Coding In this type of questions, alphabets of a word are replaced by some other alphabets according to a specific rule to form code.

Number Coding In this type of question, a word is replaced by certain numbers according to some specific rule.

Solving Coding and Decoding Questions

• Observe alphabets or numbers given in the code keenly.
• Find the sequence it follows whether it is ascending or descending.
• Detect the rule in which the alphabets/numbers/words follow.
• Fill the appropriate letter/number/word in the blank given.

Tips and Tricks

Letter positions as per English Alphabet Series: (A=1, B=2, C=3, D=4…….Y=25, Z=26). To learn this, remember a shortcut for the position of letters i.e. EJOTY where E=5, J=10, O=15, T=20 & Y=25)

Letter positions as per reverse English Alphabet Series (A=26, B=25, C=24 …., Z=1) Corresponding letter of each letter i.e., the pair of letters at the same distance from start and end of the English Alphabet Series (A is opposite to Z; B is opposite to Y, and C is opposite to X and so on) and to learn this one can use different acronyms for e.g. for AZ –> AZar; BY –> BYe; CX–> CruX; DW–>DeW and so on. This topic can be divided into the following subtopics based on the logic incorporated: