Reasoning Notes | Coding Decoding
Coding and decoding form an important part of the Analytical reasoning section in all the aptitude related papers. Usually, three to five questions appear from this area in various entrance exams. In the alphabetic coding and decoding area, the majority of the questions are of the following types:
2. Number Coding
We know ‘peacock’ is the national bird. But in the given question, ‘Peacock’ is coded as ‘Swallow’. So ‘Swallow’ is the correct answer.
To solve such questions, any two phrases with a common word are picked up. The common code word will refer to that word. Proceeding in a similar manner, all possible combinations of two phrases are selected and a common code is picked up.
E.g.
Practice QuestionTypes of coding -Decoding
1. Letter coding
2. Number coding
3. Substitution coding
4. Mixed coding
1. Letter Coding
In this type ,the real alphabet in word are replace by certain other alphabet to specific rule form it.
We take some some example to explain below-
E.g.
In a certain code, PARKING is written as RYTIKLI. How will FLOWERS be written in that code?
2. Number Coding
In this type , either numerical code are assigned to word or alphabetical code letter are assigned to the number.
E.g.
If DELHI is coded as 73541 and CALCUTTA as 82589662, how can CALICUT be coded ?
Solution:-
CALICUT = 8251896
DELHI = 73541 L=5
CALCUTTA = 8259662
3. Substitution coding
names/words are substituted with different names/words. We have to
carefully trace the substitution to arrive at the correct answer
E.g.
If ‘Parrot’ is known as ‘Peacock’, ‘Peacock’ is known
as ‘Swallow’, ‘Swallow’ is known as ‘Pigeon’, ‘Pigeon’ is known as
‘Sparrow’, what would be the name of the national bird?
Explanation:-
We know ‘peacock’ is the national bird. But in the given question, ‘Peacock’ is coded as ‘Swallow’. So ‘Swallow’ is the correct answer.
4. Mixed Coding
In this type, three-four phrases are given in coded language and the code for a particular word is asked.To solve such questions, any two phrases with a common word are picked up. The common code word will refer to that word. Proceeding in a similar manner, all possible combinations of two phrases are selected and a common code is picked up.
E.g.
- ‘new banking system’means ‘ss tp na’
- ‘officer in uniform’means ‘or mu at’
- ‘new bank officer’means ‘or bk na’
- ‘systems in bank’means ‘bk at ss’
- What is the code for ‘in’?
- What does the code ‘bk’ standS for?
