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Logical Reasoning: Tricks to solve Coding-Decoding Questions

19-MAR-2018 12:02

    Coding-Decoding is an integral part of the Logical Reasoning section in many competitive exams like Banking, SSC, etc. It basically judges the candidate’s ability to decipher the code language. In each question of this topic, a word and a coded form of the word will be given. Students are required to decode the logic behind this coding and then apply the same logic to another given word for finding the answer in the form of a code.

    Coding Decoding


    In simple words, Coding is the process of converting a word into another language by using letters and numbers while Decoding is to convert the coded value back into the normal language.

    Coding Decoding meaning

    Learn tricks to solve Alphabet Test

    Usage of Alphabetical Order

    English alphabets and their corresponding number values help the candidate to increase the performance in this area. The position of the letter in the English Alphabet is considered to be the value of the alphabet in questions on letter series. While attempting the letter series the students must memorise the corresponding value of each alphabet through different techniques.

    Coding Decoding Alphabet

    EJOTY Technique

    The EJOTY Technique is very helpful in finding the position of the alphabet as:

    EJOTY Technique

    For example, if you want to find the position of the alphabet ‘S’, then as we know that ‘T’ is 20, so ‘S’ is 20 - 1 = 19.

    Position of an Alphabet from the End

    Also, you can find the position of an alphabet from the end by subtracting its value from 27. For example, the position of D from the end is 27 – 4 = 23.

    Coding Decoding Alphanumeric

    The above pattern is very useful to find many types of question in Alphabet Series when we write the last 13 alphabets in front of the first 13 alphabets of the English.

    Learn tricks to solve Puzzle Test

    Types of Coding-Decoding Questions

    The questions on coding and decoding are basically of three types as given below:

    Letter Coding

    Example: In a certain code ‘SHIMLA’ is written as ‘RGHLKZ, how will PATNA be coded then?

    Solution:         Each letter is coded as the letter previous to it, i.e.

    S = R, H = G, I = H, M = L, L = K, A = Z.

    PATNA will be coded as OZSMZ.

    Number Coding

    Example: DAZE is written as 41265 in a certain code. How will BOY be written in the same code?

    Solution:         In this question the position of each alphabet is given like

    D = 4, A = 1, Z = 26 and E = 5.

    So, the code for BOY will be 21525 as B = 2, O = 15 and Y = 25.

    Word Coding

    Example: In a certain code ‘415’ means ‘milk is hot’; ‘18’ means ‘hot soup’; and ‘895’ means ‘soup is tasty’. What number will indicate the word ‘tasty’?

    Solution:         The code for ‘hot’ is 1.

    So, the code of ‘soup’ is 8.

    Now the code of ‘is’ is 5.

    Hence, we can say that the code of ‘tasty’ is 9.        

    If you found these tips on ‘Tricks to solve Coding-Decoding’ useful, then do visit www.jagranjosh.com for more such videos on Logical Reasoning.

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