Reasoning: Alphanumeric Series Questions Set 22

Direction: The following questions are based on the number series given below.
2      3     4     6     8     9     12     14      15       17       19        22        24          26         28         29       32     35      37      39     42    44       47

1. If all the composite numbers are deleted from the following arrangement, which element will be 2nd from left when arranged in descending order?
   
   17
   29
   37
   19
   47
   Option C
   Given: 2 3 4 6 8 9 12 14 15 17 19 22 24 26 28 29 32 35 37 39 42 44 47
   After deleting composite numbers
   2 3 17 19 29 37 47
   Numbers in descending order
   47 37 29 19 17 3 2
   Thus 37 will be 2nd element from left when arranged in descending order.

    

2. If all the even numbers are deleted from the following arrangement, then how many elements less than 20 will be left?
   One
   Two
   Three
   Four
   Five
   Option E
   Given: 2 3 4 6 8 9 12 14 15 17 19 22 24 26 28 29 32 35 37 39 42 44 47
   After deleting even numbers
   3 9 15 17 19 29 35 37 39 47
   The numbers less than 20 after deleting all even numbers:
   3 9 15 17 19
   There are five such elements.

    

3. How many digits are there which are immediately succeeded by a perfect square?
   One
   Two
   Three
   Four
   Five
   Option B
   Given: 2 3 4 6 8 9 12 14 15 17 19 22 24 26 28 29 32 35 37 39 42 44 47
   Hence, the underlined one is the digits which come before a perfect square.
   There are two such elements.
   

    

(Directions): Study the following sequence carefully and answer the questions given below it.
L        +          G        %         V         9         7         8         A         @         !         B         6         M         #         ?         P         *         E         ^         C         U         5         I         $         ©         4         D         F         ↑

4. Find the next group in the following series.
   9 A @, ! M #, ? E ^, _____
   C 5 I
   C I $
   C I ©
   U 5 ©
   I © 4
   Option B
   The given series follows the logic:
   9(+ 3) A(+ 1) @
   !(+ 3) M(+ 1) #
   ?(+ 3) E(+ 1) ^
   C(+ 3) I(+ 1) $
   

    

5. Four of the following are alike in a particular pattern and hence form a group. Find the one which does not follow the pattern?
   A @ 8
   @ ! A
   B 6 M
   M # 6
   B 6 !
   Option C
   All the four groups follows the logic +1, -1 except ‘B 6 M’.

    

6. How many digits are there in the sequence either immediately followed by digit or preceded by symbol?
   Three
   Zero
   Two
   One
   Four
   Option A
   L + G % V 9 7 8 A @ ! B 6 M # ? P * E ^ C U 5 I $ © 4 D F ↑
   9, 7 and 4 are the three digits which are either immediately followed by a digit or immediately preceded by a symbol.

    

7. Which of the following is the 20th element to the right of the 6th element to the left of the 10th element from the left end when first 20 elements reversed?
   $
   7
   I
   ©
   None of these
   Option C
   When the first 20 elements are reversed, we get the following sequence.
   ^ E * P ? # M 6 B ! @ A 8 7 9 V % G + L C U 5 I $ © 4 D F ↑
   The 20th element to the right of the 6th element to the left of the 10th element from the left is 24th element from left i.e. ‘I’.
   

    

8. How many symbols are there, each of which are either immediately followed by a consonant or preceded by a vowel, when the last 10 elements are placed after the first 10 elements in the sequence?
   
   Five
   Six
   Seven
   Eight
   Four
   Option C
   When last 10 elements are placed after first 10 elements in the sequence, we get the following sequence:
   L + G % V 9 7 8 A @ C U 5 I $ © 4 D F ↑ ! B 6 M # ? P * E ^
   +, %, @, $, !, ? and ^ are the seven symbols that follow the condition.

    

Direction: Study the following alphabet series and answer the question that follows.
A        B       C       D       E       F       G       H       I       J       K       L       M       N       O       P       Q       R       S       T       U       V       W       X       Y       Z

9. In the above alphabets, if 15 letters from left are put in the reverse order, then which letter will be the eight to right of 20th letter from right end?
   B
   P
   Q
   A
   C
   Option D
   Based on given series:
   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
   1) If 15 letters from left are put in the reverse order:
   Left End O N M L K J I H G F E D C B A P Q R S T U V W X Y Z Right End
   2) 20th letter from right end: I
   3) Letter which is eight to right of 20th letter from right end
   O N M L K J I H G F E D C B A P Q R S T U V W X Y Z
   Hence, eight letter to right of 20th letter from right end is A.
   

    

10. In the following letter series, which will replace the question mark (?)?
    ACD, EFH,?, OLP, UOT
    IJL
    IIL
    JIL
    IJK
    None of these
    Option B
    Given series: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
    1) The first letters are consecutive vowels.
    A, E, I, O, U.
    2) Second letters are forming different series.
    C + 3 = F;
    F + 3 = I;
    I + 3 = L;
    L + 3 = O.
    3) Thirdletters are forming different series.
    D + 4 = H;
    H + 4 = L;
    L + 4 = P;
    P + 4 = T.
    Hence, word formed is IIL.