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Introduction to Letter Series Notes | Study CSAT Preparation for UPSC CSE - UPSC

Document Description: Introduction to Letter Series for UPSC 2022 is part of Letter series for CSAT Preparation for UPSC CSE preparation. The notes and questions for Introduction to Letter Series have been prepared according to the UPSC exam syllabus. Information about Introduction to Letter Series covers topics like Letter Series, Important points to keep in mind always while solving letter series questions, The following two concepts in order to recall the position of alphabets easily. and Introduction to Letter Series Example, for UPSC 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Introduction to Letter Series.

Introduction of Introduction to Letter Series in English is available as part of our CSAT Preparation for UPSC CSE for UPSC & Introduction to Letter Series in Hindi for CSAT Preparation for UPSC CSE course. Download more important topics related with Letter series, notes, lectures and mock test series for UPSC Exam by signing up for free. UPSC: Introduction to Letter Series Notes | Study CSAT Preparation for UPSC CSE - UPSC
Table of contents
Letter Series
Important points to keep in mind always while solving letter series questions
The following two concepts in order to recall the position of alphabets easily.
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Letter Series

The concept of letter series is related to 26 letters of the alphabet series.
Introduction to Letter Series Notes | Study CSAT Preparation for UPSC CSE - UPSC

The questions asked would vary based on the position of an English letter to the left or right of another English letter in the alphabetical order. Sometimes the questions are asked on finding the number of English letter(s) between two different English letters, and sometimes on the arrangement of alphabetical order. It can be forward, first half forward, second half forward, backward, first half backward, second half backward, multiple letter segments in changed order, word formation, and letter position in word or series etc.


Important points to keep in mind always while solving letter series questions
(i) Position number of letters in English
Introduction to Letter Series Notes | Study CSAT Preparation for UPSC CSE - UPSC

(ii) Position number of letters in English alphabets in reverse
Introduction to Letter Series Notes | Study CSAT Preparation for UPSC CSE - UPSC(iii) A, E , I, O and U are Vowels of English Alphabets and the remaining letters are Consonants of English Alphabets.
(iv) A → M (A to M) letters are called first half of English Alphabets.
(v) N → Z (N to Z) letters are called second half of English Alphabets.
(vi) From A → Z (A to Z) letters are called 'left to right' or 'to right' in English Alphabets.
(vii) From Z → A (Z to A) letters are called 'right to left' or 'to right' in English Alphabets.
It is important to note that while solving the questions of letter series, if you keep in mind the forward and backward position of all the alphabets along with its number, you can save a lot of time.


The following two concepts in order to recall the position of alphabets easily.
1. Concept of EJOTY

Concept of EJOTY represents the position of the alphabets counting from the left at an interval of 5 letters:
Introduction to Letter Series Notes | Study CSAT Preparation for UPSC CSE - UPSC
Each letter in the term EJOTY represents the position which is multiple of 5.

2. Concept of VQLGB

Just like the concept EJOTY, the concept of VQLGB represents the position of the alphabets counting from the right at an interval of 5 letters:
Introduction to Letter Series Notes | Study CSAT Preparation for UPSC CSE - UPSC
In the next tutorials, we will talk about the different categories of questions that can be asked on letter series.


Practice Questions
Q.1. Find the letter on following positions:
(a) 17
(b) 23
(c) 7
(d) 12

Ans.
(a) 17 = 15(O) + 2 = O + 2 = Q
(b) 23 = 20(T) + 3 = T + 3 =W
(c) 7   = 5(E) + 2 = E + 2 = G
(d) 12 = 10(J) + 2 = J + 2 = L

The above all positions of the letters are from left hand side of the series. One must also know the positions of letters from the right hand side of the series also. Let us check how we will do this:

For example: 
We know that Letter “A” is on 1st position from left side and “26” form the right hand side. Therefore, the sum of the positions of any letter from both sides will always be 27.
Therefore, to check any position from right hand side, we will first convert that position to left hand side by deducting it from 27.


Q.2. Find the letters on the following positions from right hand side of   the alphabet series:
(a) 17
(b) 23
(c) 7
(d) 12

To find out these positions we will first convert all the positions from the left hand side of the series:
Ans.
(a) 17th from the right means (27-17) = 10th from left = J
(b) 23rd from the right means (27-23) = 4th from left = D
(c) 7th from the right means (27-7) = 20th from left = T
(d) 12th from the right means (27-12) = 15th from left = O

The document Introduction to Letter Series Notes | Study CSAT Preparation for UPSC CSE - UPSC is a part of the UPSC Course CSAT Preparation for UPSC CSE.
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