Letter Series

This type of series questions are based on the English letters. In this we have to find out the pattern of the series and then find out the missing letter from the series.

To solve these questions quickly you should remember following points:

1. Learn the place values of all the English Alphabets.

A	B	C	D	E	F	G	H	I	J	K	L	M
1	2	3	4	5	6	7	8	9	10	11	12	13

N	O	P	Q	R	S	T	U	V	W	X	Y	Z
14	15	16	17	18	19	20	21	22	23	24	25	26

2. Learn the pairs of opposite letters. (The letters whose sum of place values is 27.)

Types of Alphabet Series:

1. One Lettered Series

In One lettered series each term contains one letter and follows a certain pattern.

For eg: A, C, E, G, I, ?

Ans. We know that the place values of the given letters are A = 1, C = 3, E = 5, G = 7, I = 9

So, we can see that there is a difference of 2 between the place values of the corresponding letters.

Thus, the place value of the missing letter will be 11.

Hence, the correct answer is K.

2. Two Lettered Series

In Two lettered series each term contains two letters and follows a certain pattern.We have to find out the next term according to that pattern.

Example: AC, FH, KM, ?

Here, we can see that there is a gap of one letter between the letters of each group and there is a difference of two letters between the last letter of one group and the first letter of the consecutive group.

Now, M + 2 = P, and P + 1 = R.

Hence, the correct answer is PR.

3.Three Lettered Series

In Three lettered series each term contains three letters and follows a certain pattern.We have to find out the next term according to that pattern.

Example: What is the next letter in the series CNL, BLI, AJF, ZHC, _______ ?

(a) XDY

(b) YFZ

(d) XFY

Ans: If we check the place values of the letters in each pair.

So,

C = 3, B = 2, A = 1, Z = 26. (Decreasing by 1) So, the next letter will be 25, which is Y.

N = 14, L = 12, J = 10, H = 8. (Decreasing by 2) So, the next letter will be 6, which is F.

L = 12, I = 9, F = 6, C = 3. (Decreasing by 3) So, the next letter will be 26, which is Z.

Hence, the correct answer is YFZ.

4. Continuous Pattern Series

In this type, a series of small/capital letters are given which follow a particular pattern. However, some letters are missing from the series. The series follows a specific pattern and we have to find the letters which should come in place of the blank spaces or question marks.

In each of the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

1. _ stt _ tt _ tts _

(a) tsts

(b) ttst

(d) tsst

Ans: By observing the given series we can say that the pattern 'tst' is repeated. The series is tst/tst/tst/tst. Thus, the correct answer is ‘tsst’.

A	B	C	D	E	F	G	H	I	J	K	L	M
1	2	3	4	5	6	7	8	9	10	11	12	13

N	O	P	Q	R	S	T	U	V	W	X	Y	Z
14	15	16	17	18	19	20	21	22	23	24	25	26

A	B	C	D	E	F	G	H	I	J	K	L	M
1	2	3	4	5	6	7	8	9	10	11	12	13

N	O	P	Q	R	S	T	U	V	W	X	Y	Z
14	15	16	17	18	19	20	21	22	23	24	25	26

A	B	C	D	E	F	G	H	I	J	K	L	M
1	2	3	4	5	6	7	8	9	10	11	12	13

N	O	P	Q	R	S	T	U	V	W	X	Y	Z
14	15	16	17	18	19	20	21	22	23	24	25	26

Find the missing letters in the given series: _aa_a_baaaa_

Important Questions on Letter Series

Learn and Prepare for any exam you want !

Find the missing letters in the given series:

$_aa_a_baaaa_$