Alphanumeric Series Tricks & Tips
Alphanumeric (sometimes shortened to alphameric) is a combination of alphabetic and numeric characters. In some cases, it may include upper and lower case letters, punctuation marks, and symbols (such as @, &, and *,).
This type of reasoning is a mixed bag of coding-decoding, series-based reasoning and finding positions based reasoning questions.
Type of question
- Immediately Preceded By
- Immediately Followed By.
- Based on word/ Number / symbol.
Example 1 :-
These questions are based on the following letter / number/ symbol arrangement. Study it carefully and answer the questions that follow:-
L F 3 # R N 8 A @ Y 4 M © W P 6 H U 9 I K 2 E
the left end?
a) I
L F # R N A @ Y M © W P H U I K E
ATQ, 14th From Left end –
vowel?
a) None
(a) I58P
(b) J58Q
(c) K58Q
(d) I57Q
Solution :-
For Numbers :- 
For Alphabet : 
So option (c) K58Q.
Practice Problems On Alphanumeric Series
Directions (1-5): Study the following arrangement and answer questions given:
( F E ~ 6 2 % S A 8 B ) * 1 L O 9 @ W U $ 3 ^ P 4 C V #
- How many such vowels are there in the above arrangement, each of which is immediately followed by a symbol and not preceded by a letter?
A) Four
B) Three
C) Two
D) One
E) None - What is the sum of all numbers which are immediately preceded by a symbol?
A) There are no such numbers
B) 10
C) 12
D) 9
E) 11 - What will come in place of questions mark (?) based on the above arrangement?
3U^ $W3 U@$ W9U ?
A) 9OW
B) Other than those given in options
C) @9W
D) @OW
E) U@W - Four of the following five are alike in a certain way based on their positions in the above arrangement and so form a group. Which is the one that does not belong to that group?
A) (#V
B) EC4
C) 2^P
D) S$U
E) *OL - Which of the following is the 9th to the left of the 17th from the left end of the above arrangement?
A) @
B) S
C) 9
D) %
E) O
Directions (6-10): Study the following arrangement and answer questions given:
K J 2 ^ U ! A S 3 C 7 $ 9 L # D O 8 X I % N P 4 E * M + W
- How many such numbers are there in the above arrangement, each of which is immediately preceded by a consonant and immediately followed by a vowel?
A) One
B) Three
C) Two
D) Five
E) None - How many such consonants are there in the above arrangement, each of which is immediately preceded by a symbol and immediately followed by a letter?
A) Four
B) Three
C) Two
D) Five
E) None - Which of the following is the 8th to the right of the 19th from the right end of the above arrangement?
A) %
B) #
C) 8
D) X
E) None of these - Four of the following five are alike in a certain way based on their positions in the above arrangement and so form a group. Which is the one that does not belong to that group?
A) $97
B) U!^
C) XI8
D) +WM
E) C7S - Which of the following is the 5th to the left of the 13th from the right end of the above arrangement?
A) 7
B) 9
C) S
D) $
E) !
Directions (1-5): In each question below is given a group of letters followed by four combinations of digits/symbols given in (A), (B), (C) and (D). You have to find out which of the combinations correctly represents the group of digits based on the rules and mark the answer accordingly. If none of the combinations correctly represents the group of letters, mark (E) as your answer.
(i) If the first two letters are vowels, the codes for first and last letters are to be interchanged.
(ii) If the first letter is a consonant, the codes for the second and third letters are to be interchanged.
(iii) If the last letter is a vowel then the second letter is to be coded as the code for the vowel.
- UEPMOQ
A) 3^70@#
B) 4^70!#
C) 4^70@#
D) 4^70©#
E) None of these - OPHDLU
A) #@286#
B) @#286#
C) @#246
D) @#286
E) None of these - MIRKNQ
A) O©#9*4
B) 9©%9*4
C) O©%9*4
D) O©%9@4
E) None of these - HOLUIB
A) 26@!%3
B) 26^#%3
C) 26@#%7
D) 24@#%3
E) None of these - OINRBK
A) 9@*©3@
B) 9%6©3@
C) 7%*©3@
D) 9%*©3@
E) None of these
Directions (6-10): Study the following arrangement and answer questions given:
4 8 @ B D E ! Y I 7 * K W 6 A L 5 # 9 O 2 U ^ © 3 N ( M $
- Which of the following is the 9th letter to the left of the 16th letter from the right end?
A) E
B) B
C) D
D) *
E) @ - How many such letters are there in the above arrangement each of which is immediately preceded by a symbol and immediately followed by a consonant?
A) Four
B) Three
C) None
D) One
E) Five - Complete the series: 4$V (BD !©^ 27* ?
A) K#5
B) W95
C) W#5
D) W9#
E) K9# - How many such numbers are there each of which is immediately preceded by a symbol?
A) None
B) One
C) Two
D) Three
E) More than three - Four of the five are alike in a certain way based on arrangement, which does not belong to the group?
A) KW*
B) BD@
C) MV(
D) V$(
E) ©3^
Directions (1-5): In each question below is given a group of digits followed by four combinations of digits/symbols given in (A), (B), (C) and (D). You have to find out which of the combinations correctly represents the group of digits based on the rules and mark the answer accordingly. If none of the combinations correctly represents the group of letters, mark (E) as your answer.
(i) If the first digit is odd and last is even, then interchange the codes for both digits
(ii) If there is a digit which is getting repeated in the given number, then code that digit as the code of 5
(iii) If the third digit is followed by an even number and is preceded by an odd number, then skip its code.
(iv) If the middle digit is odd then interchange the codes of middle digit and last number.
(v) 0 is neither odd nor even
- 53678
A) #©DH!
B) ©!DH#
C) !©DH#
D) !©HD#
E) None of these - 12375
A) @L©H#
B) @L#H©
C) @H#L©
D) @L!H©
E) None of these - 36014
A) ©DE@O
B) OED@©
C) ODE%©
D) ODE@©
E) None of these - 81624
A) !@LDO
B) !@DLO
C) !@LO
D) !@OL
E) None of these - 60456
A) *O#H#
B) #EO##
C) *©#H#
D) OB©# #
E) None of these
Directions (6-10): Study the following arrangement and answer questions given:
H N 4 & T E 3 ( @ 5 R 1 * J S 2 % 9 M 6 A L O # V U 7 !
- Which of the following is the 6th letter to the right of the 20th letter from the right end?
A) J
B) S
C) 2
D) %
E) @ - How many such numbers are there in the above arrangement each of which is immediately preceded by a symbol and immediately followed by a letter?
A) None
B) One
C) Two
D) Three
E) More than three - Complete the series: T&3 (35 R5* J*2 ?
A) %26
B) %29
C) %SM
D) %2M
E) None of these - How many such consonants are there each of which is immediately preceded by a number?
A) None
B) One
C) Two
D) Three
E) More than three - Four of the five are alike in a certain way based on arrangement, which does not belong to the group?
A) 4T&
B) 51R
C) *SJ
D) 29M
E) OV#
Directions (6-10): Study the following arrangement and answer questions given:
2 0 4 5 3 6 8 4 2 5 1 7 4 8 5 6 9 3 2 0 4 7 4 5 8 9 2 5 7 3 1 7 4 2 9 0
- Which of the following is the 9th letter to the left of the 21st letter from the right end?
A) 4
B) 8
C) 6
D) 2
E) 5 - How many such 4’s are there in the above arrangement, each of which is immediately preceded by an odd digit and immediately followed by an even digit? (0 is neither odd nor even)
A) Four
B) Three
C) Two
D) One
E) Five - How many such 7’s are there in the above arrangement, each of which is immediately preceded by a perfect square?
A) Four
B) Three
C) Two
D) One
E) Five - How many such 5’s are there in the above arrangement, each of which is immediately followed by a digit which has a numerical value greater than 6?
A) None
B) One
C) Two
D) Three
E) More than three - If all the odd numbers are deleted from the above arrangement, then which of the following will be 9th from the right end?
A) 2
B) 6
C) 4
D) 0
E) 8
Directions (6-10): Study the following arrangement and answer questions given:
R % # D E W 3 @ 0 M ! L 6 * A G U 8 ^ V & S 7 O H 1 2 $ B I )
- Which of the following is the 5th letter to the right of the 16th letter from the right end?
A) S
B) ^
C) V
D) &
E) * - How many such symbols are there in the above arrangement each of which is immediately preceded by a consonant and immediately followed by a number?
A) Four
B) Three
C) None
D) One
E) Five - Which of the following is the 9th letter to the left of the 18th letter from the left end?
A) @
B) 0
C) M
D) 8
E) & - How many such numbers are there each of which is immediately preceded by a consonant?
A) None
B) One
C) Two
D) Three
E) More than three - Four of the five are alike in a certain way based on arrangement, which does not belong to the group?
A) @3!
B) GA^
C) OS2
D) D#3
E) 8U&
Directions (1-5): Study the following arrangement and answer questions given:
J % K 7 D E $ 4 9 H I 3 ( @ A M 8 ^ F Q O U + & B P W ! 2
- How many such vowels are there in the above arrangement, each of which is immediately followed by a symbol?
A) Four
B) Three
C) Two
D) Five
E) None - If all the symbols are dropped from the above arrangement, how many such numbers will be there in the above arrangement, each of which is immediately followed by a consonant?
A) Four
B) Three
C) Two
D) Five
E) None - What will come in place of questions mark (?) based on the above arrangement?
DK$ E74 $D9 4EH ?
A) 94H
B) Other than those given in options
C) H4I
D) H43
E) 9$I - Four of the following five are alike in a certain way based on their positions in the above arrangement and so form a group. Which is the one that does not belong to that group?
A) K%$
B) H$(
C) U^+
D) O^+
E) P+! - Which of the following is the 6th to the left of the 17th from the left end of the above arrangement?
A) 3
B) (
C) H
D) I
E) 9
Directions (6-10): Study the following arrangement and answer questions given:
R 4 % D ) A 5 T I 3 # 1 W E 2 @ * 9 ^ B H O 5 ! Y
- How many such numbers are there in the above arrangement, each of which is immediately preceded by a consonant and immediately followed by a vowel?
A) Four
B) Three
C) Two
D) Five
E) None - How many such consonants are there in the above arrangement, each of which is immediately preceded by a number and immediately followed by a letter?
A) Four
B) Three
C) Two
D) Five
E) None - Which of the following is the 5th to the right of the 19th from the right end of the above arrangement?
A) 3
B) #
C) W
D) 1
E) None of these - Four of the following five are alike in a certain way based on their positions in the above arrangement and so form a group. Which is the one that does not belong to that group?
A) D)4
B) 5T)
C) 1W3
D) @*2
E) HO^ - Which of the following is the 8th to the left of the 9th from the right end of the above arrangement?
A) 3
B) T
C) I
D) )
E) A
Directions (Q. 1-5): Answer these questions referring to the symbol – letter – number sequence given below:
H ⍺ K 7 D ¢ M L 3 ● G 7 β Z 6 * δ θ 1 F B @ 9 S γ 2 $ P 4 A ∆ 5
1).How many letters in the sequence either immediately precede a number or immediately follow a symbol?
- a)Eight
- b)Four
- c)Five
- d)Six
- e)None of these
2).What is the total number of ‘the letters immediately preceded by a number belonging to the second half of the sequence’ and ‘the symbol immediately preceded by a letter belonging to the second half of the English alphabet’ in the above sequence?
- a)Three
- b)Four
- c)Five
- d)Six
- e)None of these
3).If the second half of the series is written in the reverse order which of the following will be twelfth element to the right of ninth element from your left?
- a)4
- b)$
- c)P
- d)A
- e)None of these
4).Which of the following will be the seventh element to the left of 19thelement from your left in the above series?
- a)Z
- b)β
- c)G
- d)7
- e)None of these
5).Four of the following five are alike in a certain way and hence from a group. Which one does not belong to the group?
- a)H ¢ 7
- b)k ● 6
- c)D β 1
- d)M * 9
- e)L @ 4
Directions (Q. 6 -10) Answer these questions referring to the symbol – letter – number sequence given below.
% £ 8 σ K β Z M S < 2 @ 7 E ⍺ * Σ P 6 1 D $ L 5 # 1 4
6).What is the total number of ‘the symbols immediately preceded by a number’ and ‘the numbers immediately preceded by a letter’ in the above sequence?
- a)Six
- b)Seven
- c)Five
- d)Four
- e)None of these
7).‘* Σ’ is related to ‘P⍺’ in the same way as ‘$#’ is related to
- a)I Σ
- b)L5
- c)ID
- d)5L
- e)None of these
8).Four of the five are similar in respect of their positions in the above sequence and hence from a group. Which one does not belong to the group?
- a)Z σ M
- b)@ S 7
- c)Σ ⍺ P
- d)I Σ D
- e)# S I
9).If letters at even places in the English alphabet are arranged in alphabetical order among themselves from left and numbers are arranged in descending order from left then in the rearranged series how many elements will be there between 6 and Z?
- a)9
- b)8
- c)10
- d)7
- e)None of these
10).What will come in place of the question mark (?) in the following character series?
8 β S, Z< 7, 2 E Σ, ?
- a)D54
- b)⍺PD
- c)ΣIL
- d)6#$
- e)None of these
Answers & Explanation:
1).H ⍺ k 7 D ¢ M L 3 ● G 7 β Z 6 * δ θ 1 F B @ 9 S γ 2 $ P 4 A ∆ 5 (seven letters)
Answer: c)
2).H ⍺ k 7 D ¢ M L 3 ● G 7 β Z 6 * δ θ 1 F B @ 9 S γ 2 $ P 4 A ∆ 5 (Five)
Answer: c)
3).H ⍺ K 7 D ¢ M L 3 ● G 7 β Z 6 * δ θ 1 F B @ 9 S γ 2 $ P 4 A ∆ 5
Answer: c)
4).(19 – 7 =) 12th element from the left.
Answer: d)
5).The group consist of 1st letter, 2nd symbol, third number: 2nd letter, 3rd symbol, 4thnumber; 3rdletter, 4th symbol, 5th number and so on. Hence it will be L δ 2.
Answer: e)
6).% £ 8 σ K β Z M S < 2 @ 7 E ⍺ * Σ P 6 1 D $ L 5 # 1 4
Answer: a)
7).The second character after the first symbol and the second character before the second symbol have been taken to form the second group.
Answer: d)
8).The rest have: The second character in each group is third character to the left of first character of that group as given in the sequence. The third character in each group is immediately right of the first character of that group as given in the sequence.
Answer: c)
9).Now the series becomes:
% £ 8 σ K (11) β D (4) M (13) S (19)< 7 @ 6 E (5) ⍺ * Σ L (12) 5 4 P (16) $ Z (26) 2 # I (9) 11.
The no. in the bracket after each letter shows its position in English alphabet. Only even-placed letters are rearranged.
Answer: a)
10).There is a gap of two characters between both pairs of characters in each group. And the next group starts with the 4th character to the right of the first character of the previous group.
Answer: a)
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