Coding and Decoding: Exercise-4


Directions (1-5): In each of these questions, a group of letters, numbers, and symbols is given. Study the given arrangement carefully and answer the questions given below.


K 5 # M T * 4 3 $ N W % 2 1 & P B 7 C 8



  1. How many such letters are there, each of which is immediately followed by a number and immediately preceded by a consonant?

    1. one
    2. two
    3. three
    4. four


Answer: (a) one

Solution: Only one combination is following the condition and it is 'P B 7'.

  1. How many such symbols are there, each of which is immediately followed by a number and immediately preceded by a letter?

    1. one
    2. two
    3. three
    4. four


Answer: (b) two

Solution: There are two such combinations following the condition and combinations are 'T * 4' and 'W % 2'.

  1. If all the symbols are dropped, then which will be the twelfth element from the left end?

    1. B
    2. P
    3. 7
    4. C


Answer: (a) B

Solution: If all the symbols are dropped then the new arrangement would be 'K 5 M T 4 3 N W 2 1 P B 7 C 8' and the twelfth element from the left end will be 'B'.

  1. Which of the following is the ninth element to the left of the fourth element from the right?

    1. *
    2. 4
    3. $
    4. 3


Answer: (d) 3

Solution: The number will be the thirteenth element from the right, which is '3'.

  1. What will come in place of question mark (?) in the given series based on the given arrangement?

    2. '# M *' '4 3 N' 'W % 1' ?


    1. & P 7
    2. P B C
    3. 1 & P
    4. 2 1 P


Answer: (a) & P 7

Solution: There is a gap of one element between both the elements of the first term in every combination.

Directions (6-10): Study the following information carefully and answer the questions given below.


In a certain code, 'they are with group' is written as 'qe pr mb rx'

'friends are like life' is written as 'dk sn pr mo'

'fun makes life easier' is written as 'hu mo vg as'

'outing with friends fun' is written as 'mb as tc sn'


  1. What is the code for 'outing' in the given code language?

    1. tc
    2. as
    3. vg
    4. sn


Answer: (a) tc

Solution: In the fourth statement, the word 'outing' stands for the code word 'tc'.

  1. If 'friends like picnic' is written as 'cp sn dk' in the given code language, how will 'picnic are fun' be coded as?

    1. cp vg mo
    2. pr cp as
    3. as cp tc
    4. pr vg hu


Answer: (b) pr cp as

Solution: In the statements first and second the word 'are' stands for the code word 'pr' and in the statements third and fourth the word 'fun' stands for the codeword 'as' and from the statement given in the question it is clear that the word 'picnic' stands for the code word 'cp', so the statement 'picnic are fun' stands for the code word 'pr cp as'.

  1. What is the code for 'easier' in the given code language?

    1. hu
    2. vg
    3. mo
    4. eather 'hu' or 'vg'


Answer: (d) eather 'hu' or 'vg'

Solution: In the third statement, it is not clear that which codeword stands for the word 'easier' it may be 'hu' or 'vg'.

  1. What will be the code for 'life with fun' in the given code language?

    1. as mo mb
    2. as rx vg
    3. mo pr tc
    4. hu mb dk


Answer: (a) as mo mb

Solution: In the second and third statements, the word 'life' stands for the code word 'mo' and in the statements first and fourth statements, the word 'with' stands for the code word 'mb' and in the statements third and fourth, the word 'fun' stands for the code word 'as', so the statement 'life with fun' stands for the code word 'as mo mb'.

  1. In the given code language what does the code 'rx' stand for?

    1. group
    2. they
    3. eather 'they' or 'with'
    4. eather 'group' or 'they'


Answer: (d) eather 'group' or 'they'

Solution: In the first statement, it is not clear that which word stands for the code word 'rx', it may be 'group' or 'they'.