Alpha-Numeric Sequence puzzles

Logical Reasoning Questions based on Alpha-Numeric Sequence puzzles can be tried upon in this question and answers. Attempt all of them to know if you understand it's basic concept.This section is very useful for those who are preparing for competitive exams such as Written test of Bank Exams, CAT Exams, Railway Exams, SSC, UPSC,Banking,Insurance, Defence and many more.

  • Q1.Directions : Study the following series of alphanumeric series combination and answer the question given below.

    If the position of 6 and 2 are interchanged and similarly the position of U and R are interchanged then how many symbols will be there each of which is either preceded or followed by a vowel?

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  • Q2.Directions : Study the following series of alphanumeric series combination and answer the question given below.

    What should come in place of question mark on the basis of the above arrangement?
    (A) U G Q
    (B) 5 A B
    (C) I T #
    (D) ?

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  • Q3.Directions : Study the following series of alphanumeric series combination and answer the question given below.

    Which of the following is the fifth to the right of the fifteenth from the right end?

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  • Q4.Directions : Study the following series of alphanumeric series combination and answer the question given below.

    Four of the following five are alike in a certain way on the basis of the above arrangement and hence form a group. Which one does not belong to that group?

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  • Q5.Directions : Study the following series of alphanumeric series combination and answer the question given below.

    If order of the last eleven elements is reserved, which of the following will be seventh to the right of ninth from the left end?

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  • Q6.Directions : In each question below is given a group of digits/symbols followed by four combinations of letters numbered (a), (b), (c) and (d). You have to find out which of the combination correctly represents the group of digits/ symbols based on the following ceding system and the conditions those follow. If none of the combinations correctly represents the group of letters/ digits, give (e) i.e. 'None of these' as the answer.
    Digit/Symbol: `1 # $ 9 8 6 % @ © 7 2 4 * 35
    Letter/Code: B D E N I V R G H K T J P FA
    Conditions:
    (i) If both the first and the last elements in the group are odd digits then both are to be coded as y.
    (ii) If the first element is a symbol and the last element is an even digit, the codes for the first and the last elements are to be interchanged,
    (iii) If the first element is an odd digit, and the last element is a symbol, both are to be coded as 'Z'.
    (iv) If the first element is an even digit and the last element' is odd digit, both are to be coded as the code for the odd digit.
    3$95#1

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  • Q7.Directions : In each question below is given a group of digits/symbols followed by four combinations of letters numbered (a), (b), (c) and (d). You have to find out which of the combination correctly represents the group of digits/ symbols based on the following ceding system and the conditions those follow. If none of the combinations correctly represents the group of letters/ digits, give (e) i.e. 'None of these' as the answer.
    Digit/Symbol: 1 # $ 9 8 6 % @ © 7 2 4 * 3 5
    Letter/Code: B D E N I V R G H K T J P F A
    Conditions:
    (i) If both the first and the last elements in the group are odd digits then both are to be coded as y.
    (ii) If the first element is a symbol and the last element is an even digit, the codes for the first and the last elements are to be interchanged,
    (iii) If the first element is an odd digit, and the last element is a symbol, both are to be coded as 'Z'.
    (iv) If the first element is an even digit and the last element' is odd digit, both are to be coded as the code for the odd digit.
    8%©3#5

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