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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 

  1.  Immediately Preceded By
  2.  Immediately Followed By.
  3.  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 

Q . If all numbers are dropped from the above arrangement, which of the following will be the fourteenth from
the left end?
a) I
b) P
c) W
d) U
e) None of these
Solution :- If all number are dropped, the arrangement will look like-

                L     F        #    R    N       A    @    Y         M      ©       W       P             H        U          I       K          E 

ATQ, 14th From Left end –

Example 2 : Study the following arrangement carefully and answer the questions given below.
 
                                 R 4 P I J M Q 3 % T @ © U K 5 V 1 W $ Y 2 B E 6 # 9 D H 8 G & Z N
Q . How many such numbers are there in the above arrangement each of which is immediately preceded by a
vowel?
a) None
b) One
c) Two
d) Three
e) None of these
Solution:-
STEP 1) 1st we have to identify all the vowel in the arrangement.
Vowel in Above arrangement-  I , U , E
STEP 2) ATQ ,  numbers  in the above arrangement each of which is immediately preceded by a vowel
Since we can see there is no such number which is preceded by vowel , so e) None of these
Example 3 :C2E, E5H, G12K, 127N, ?

(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      # 

  1. 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
    View Answer
    Option E
  2. 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
    View Answer
    Option B
    Explanation:
    6+1+3 = 10
  3. 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
    View Answer
    Option D
  4. 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
    View Answer
    Option C 
  5. 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
    View Answer
    Option B
    Explanation:
    Left of left – 17-9 = 8th from left = S

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

  1. 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
    View Answer
    Option A
    Only 4  — P   4   E
  2. 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
    View Answer
    Option C
    Explanation:
    D, N
  3. 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
    View Answer
    Option D
    Explanation:
    Right to right = 19-8=11th from right = X
  4. 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
    View Answer
    Option E
  5. 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) !
    View Answer
    Option D
    Explanation:
    Left of right = 13+5=18th from right

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.

  1. UEPMOQ
    A) 3^70@#
    B) 4^70!#
    C) 4^70@#
    D) 4^70©#
    E) None of these
    View Answer
    Option C
    Explanation: 

    The given number satisfies rule (i)
  2. OPHDLU
    A) #@286#
    B) @#286#
    C) @#246
    D) @#286
    E) None of these
    View Answer
    Option B
    Explanation: 

    The given number satisfies rule (iii)
  3. MIRKNQ
    A) O©#9*4
    B) 9©%9*4
    C) O©%9*4
    D) O©%9@4
    E) None of these
    View Answer
    Option C
    Explanation: 

    The given number satisfies rule (ii)
  4. HOLUIB
    A) 26@!%3
    B) 26^#%3
    C) 26@#%7
    D) 24@#%3
    E) None of these
    View Answer
    Option E
    Explanation: 

    The given number satisfies rule (ii)
    26@#%3
  5. OINRBK
    A) 9@*©3@
    B) 9%6©3@
    C) 7%*©3@
    D) 9%*©3@
    E) None of these
    View Answer
    Option D
    Explanation: 

    The given number satisfies rule (i)

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      $

  1. 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) @
    View Answer
    Option C 
    Left to right = 16+9 = 25th from right
  2. 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
    View Answer
    Option B
    Solution: 

    B, K, and M
  3. Complete the series: 4$V (BD !©^ 27* ?
    A) K#5
    B) W95
    C) W#5
    D) W9#
    E) K9#
    View Answer
    Option C
    Solution: 

    4$V – 4=first element, $= first element from last, V = previous letter of $
    (BD – ( = leaving one letter from V, ( = 4th element from last, B= 4th element from starting, D = next letter to B
    !©^ – ! = leaving one letter from D, ! = 7th from starting, © = 7th from last, ^ = previous to ©
    27* – 2 = leaving one letter from ^, 2 = 10th from last, 7 = 10th from starting, * = next to 7
  4. 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
    View Answer
    Option C
    Solution: 

    9, and 3
  5. 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^
    View Answer
    Option D 

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

  1. 53678
    A) #©DH!
    B) ©!DH#
    C) !©DH#
    D) !©HD#
    E) None of these
    View Answer
    Option C
    Solution: 
    The given number satisfies rule (i)
  2. 12375
    A) @L©H#
    B) @L#H©
    C) @H#L©
    D) @L!H©
    E) None of these
    View Answer
    Option B
    Solution: 
    The given number satisfies rule (iv)
  3. 36014
    A) ©DE@O
    B) OED@©
    C) ODE%©
    D) ODE@©
    E) None of these
    View Answer
    Option D
    Solution: 
    The given number satisfies rule (i)
  4. 81624
    A) !@LDO
    B) !@DLO
    C) !@LO
    D) !@OL
    E) None of these
    View Answer
    Option C
    Solution: 
    The given number satisfies rule (iii)
  5. 60456
    A) *O#H#
    B) #EO##
    C) *©#H#
    D) OB©# #
    E) None of these
    View Answer
    Option B
    Solution: 
    The given number satisfies rule (ii)

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    !

  1. 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) @
    View Answer
    Option B 
    Solution: 
    Right to right = 20-6 = 14th from right
  2. 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
    View Answer
    Option C
    Solution: 

    5, and 9
  3. Complete the series: T&3     (35     R5*     J*2 ?
    A) %26
    B) %29
    C) %SM
    D) %2M
    E) None of these
    View Answer
    Option D
  4. 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
    View Answer
    Option C
    Solution: 

    R and M
  5. 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#
    View Answer
    Option D 

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

  1. 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
    View Answer
    Option B
    Solution: 
    Left from Right = 21+9 = 30th from right
  2. 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
    View Answer
    Option C
    Solution:
    7     4     8, 7    4    2
  3. 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
    View Answer
    Option B
    Solution: 

    1    7, 4     7, 1     7
  4. 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
    View Answer
    Option C
    Solution: 

    5     8, 5     7
  5. 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
    View Answer
    Option A 

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      )

  1. 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) *
    View Answer
    Option D
    Solution: 
    Right to right = 16-5 = 11th from right
  2. 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
    View Answer
    Option C
  3. 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) &
    View Answer
    Option B
    Solution: 

    Left to left  = 18-9 = 9th from left
  4. 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
    View Answer
    Option E
    Solution: 

    3, 6, 7, 1
  5. 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&
    View Answer
    Option C 

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

  1. 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
    View Answer
      Option C
    Explanation:
    E, U
  2. 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
    View Answer
      Option B
    Explanation:
    7, 9, 8
  3. 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
    View Answer
      Option E
  4. 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+!
    View Answer
      Option E 
    Explanation:
    All options carry a letter followed by 2 symbols. Observe that the first symbol is the symbol which is before the letter and second symbol after letter as:
    %   K    7   D    E   $
    $   4   9   H   I   3   (
    ^      F   Q    O   U   +
    ^      F   Q    O   U   +
    &   B   P   W   !   2
    So with P should be   P&!
  5. 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
    View Answer
      Option D
    Explanation:
    Left of left – 17-6 = 11th from left = I

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

  1. 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
    View Answer
      Option E
  2. 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
    View Answer
      Option C
    Explanation:
    T, W
  3. 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
    View Answer
      Option D
    Explanation:
    Right to right = 19-5=14th from right = 1
  4. 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^
    View Answer
      Option D
  5. 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
    View Answer
    Option C
    Explanation:
    Left of right = 9+8=17th from right

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?

  1. a)Eight
  2. b)Four
  3. c)Five
  4. d)Six
  5. 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?

  1. a)Three
  2. b)Four
  3. c)Five
  4. d)Six
  5. 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?

  1. a)4
  2. b)$
  3. c)P
  4. d)A
  5. 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?

  1. a)Z
  2. b)β
  3. c)G
  4. d)7
  5. 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?

  1. a)H  ¢  7
  2. b)k  ●  6
  3. c)D  β  1
  4. d)M  *  9
  5. 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?

  1. a)Six
  2. b)Seven
  3. c)Five
  4. d)Four
  5. e)None of these

7).‘*  Σ’ is related to ‘P⍺’ in the same way as ‘$#’ is related to

  1. a)I Σ
  2. b)L5
  3. c)ID
  4. d)5L
  5. 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?

  1. a)Z σ  M
  2. b)@  S  7
  3. c)Σ  ⍺  P
  4. d)I  Σ  D
  5. 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?

  1. a)9
  2. b)8
  3. c)10
  4. d)7
  5. 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,  ?

  1. a)D54
  2. b)⍺PD
  3. c)ΣIL
  4. d)6#$
  5. 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  $ 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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