Letter Series Completion problem

Letter Series Completion

1.  In these series, you will be looking the letter pattern. Fill the blank in the middle of the series.
QPO, NML, KJI, _____, EDC

Answer : HGF
Explanation :
This series consists of letters in a reverse alphabetical order.


2.  In these series, you will be looking at both the letter pattern. Fill the blank in the end of the series.
JE, LH, OL, SQ, ----

Answer : XW
Explanation :
The first letter moves 2, 3, 4 ... steps forward to obtain the code.
The second letter moves 3, 4, 5 ... steps forward to obtain the corresponding letters of the code.


3.  Find the missing letter in the given series:
Y, B, T, G, O, ?

Answer: L
Explanation:
The given sequence is a combination of two series :
I. Y, T, O and II. B, G, ?
I consists of 2nd, 7th and 12th letters from the end of the English alphabet, while
II consists of 2nd, 7th and 12th letters from the beginning of the English alphabet.
So, the missing letter in II is the 12th letter from the beginning of the English alphabet, which is L.


4.  Find the missing letter in the series:
QIOK : MMKO :: YAWC : ?

Answer: UESG
Explanation:
The 1st and 3rd letters in the element QIOK is moved four steps backward and the 2nd and 4th letters in the same element is moved four steps forward to obtain MMKO
Similarly, for the questioned element YAWC, Y and W is moved 4 steps backward to give U and S
and the letters A and C is moved 4 steps forward to give E and G.
Hence, the answer is UESG.


5.  Fill the blank in the end of the series. 
JE, LH, OL, SQ,.....? 

Answer : XW
Explanation :
The first letter(J,L,O,S) moves 2, 3, 4, 5, ... steps forward.
The second letter(E,H,L,Q) moves 3, 4, 5, 6, ..... steps forward in this series.


6.  In these series, you will be looking at the letter pattern. Fill the blank in the middle of the series.
FAG GAF HAI IAH _____

Answer : JAK
Explanation :
The middle letters are static,so concentrate on the first and third letters.
The series involves an alphabetical order with a reversal of the letters.
The first letters are in alphabetical order: F, G, H, I, J. The second and fourth segments are reversals of the first and third segments.


7.  In these series, you will be looking at both the letter pattern. Fill the blank in the end of the series.
DKY,FJW,HIU,JHS,_____

Answer : LGQ
Explanation :
The first letter of moves two steps forward to obtain the first letter.
The second letter of moves one step backward to obtain the second letter of the successive term.
The third letter moves two steps backward to obtain the third letter of the subsequent term.


8.  Look at this series: J14, L16, __, P20, R22. 
What number should come next? 

Answer : N18
Explanation :
In this series, the letters moves two steps forward.
The number is increase by 2.


9.  In these series, you will be looking at both the letter pattern. Fill the blank in the end of the series.
JAK KBL LCM MDN ____

Answer : NEO
Explanation :
This is an alternating series in alphabetical order.
The middle letters follow the order ABCDE. The first and third letters are alphabetical beginning with J.
The third letter is repeated as a first letter in each subsequent three-letter segment.


10.  Look at this series: U32, V29, __, X23, Y20, . . .. 
What number should fill the blank? 

Answer : W26
Explanation :
In this series, the letters progress by 1.
The numbers decrease by 3.