Letter Coding Decoding - Backward Sequence

LETTER CODING DECODING: Coding with Backward Sequence

Introduction : Coding is a system of signals. This is a method of transmitting information in the form of codes or signals without it being known by a third person. The person who transmits the code or signal, is called the sender and the person who receives it, is called the receiver. Transmitted codes or signals are decoded on the other side by the receiver—this is known as decoding

LETTER CODING DECODING: Coding with Backward Sequence : This is the pattern of coding which exhibits the natural correlation of Arabic numbers with alphabetic letters. For instance, alphabets A to Z are assigned the numeric codes from 1 to 26 in the reverse order like A = 26, B = 25 and so on. 

Backward Sequence (e.g. Z = 1,Y = 2, A = 26, etc.)

NOTE : Backward order position of a letter = 27 − Forward order position of letter

For Example : Backward order position of E = 27 − Forward order position of E = 27 −52 = 22

Example 1: In a certain code, TROPICAL is written as RPMNGAYJ . How would ‘ECOSYSTEM’ be written in that code?

(A) CAMQWRRCK               (B) ) CAMQWQRCK           (C) ) CANQWQRCK                     (D)  ) CAMQXQRCK           

Answer : (b)

Solution : In this question, we can identify the following relationship:

T - 2 = R

R - 2 = P

O - 2 = M

P - 2 = N

I - 2 = G

C - 2 = A

A - 2 = Y

L - 2 = J

Now, apply this relation in the word :

E - 2 = C

C - 2 = A

O - 2 = M

S - 2 = Q

Y - 2 = W

S - 2 = Q

T - 2 = R

E - 2 = C

M - 2 = K

 Hence the answer is CAMQWQRCK.

Example 2 : In a certain code, ‘DECIDUOUS’ is coded as ‘ABZFARLRP’. Which words from the following would be coded as ‘BSBODOBBK’?

(A)   EVRGREEN            (B)  EVERGREEN              (C)   GREENEVER            (D)  EVERGEERN

Answer : (B)

Solution : In this question, we can identify the following relationship:

D - 3 = A

E - 3 = B

C - 3 = Z

I - 3 = F

D - 3 = A

U - 3 = R

O - 3 = L

U - 3 = R

S - 3 = 16

Now, apply this relation in the word :

E - 3 = B

V - 3 = S

E -  3 = B

R -  3 = O

G -  3 = D

R -  3 = O

E -  3 = B

E -  3 = B

N - 3 = K

Hence, the correct option is EVERGREEN.

Example 3 : In a certain code, CROP is coded as CQOO . Which of the following is the coded of PRODUCTION  ?

(A) PQOCUBTHON            (B) POQUCBTHOM     (C) PQOCUBTHOM     (D) QQOCUBTHOM

Answer : (C)

Solution : In this question, we can identify the following relationship:

C - 0 = C

R - 1 = Q

O -0 = O

P - 1 = O

Now, apply this relation in the word :

P - 0 = P

R - 1 = Q

O - 0 = O

D - 1 = C

U - 0 = U

C - 1 = B

T - 0 = T

I - 1 = H

O - 0 = O

N - 1 = M

Hence, the correct option is PQOCUBTHOM.

Example  4 : In a certain code, MICROORGANISMS  is coded as KFAOMLPDYKGPKP. Which of the following is the coded of  CONSERVATION  ?

(A)  ALLPCOTXRFMK          (B)   ALLPCTXORFMK       (C)  ALLPCOTBMFK        (D) ALLPTOAXRFMK     

Answer : (A)

Solution : In this question, we can identify the following relationship:

M -2 = K

I - 3 = F

C - 2 = A

R -  3 = O

O - 2 = M

O - 3 = L

R - 2 = P

G -  3 = D

A -2 = Y

N-  3 = K

I -  2 = G

S  -  3 = P

M - 2 = K

S - 3 = P

Now, apply this relation in the word :

C - 2 = A

O - 3 = L

N - 2 = L

S - 3 =   P

E - 2 = C

R - 3 = O

V - 2 = T

A - 3 = X

T - 2 = R

I - 3 = F

O - 2 = M

N - 3 = K

Hence, the correct option is ALLPCOTXRFMK

Example  5 : In a certain code,AGRICULTURE  is coded as  VBMDXPGOPMZ. Which of the following is the coded of  IMPROVEMENT?

(A)   DKHJMQZHZIO    (B) )   DHKMJQZHZIO          (C)  )   DHHIKQZHZIO       (D)   )   DHKMIZZHZIO  

Answer : (B)

Solution : In this question, we can identify the following relationship:

A - 5 = V

G - 5 = B

R - 5 = M

I - 5 = D

C - 5 = X

U - 5 = P

L - 5 = G

T - 5 = 15

U - 5 = P

R - 5 = M

E - 5 = Z

Now, apply this relation in the word :

I - 5 = D

M - 5 = H

P - 5 = K

R - 5 = M

O - 5 = J

V - 5 = Q

E - 5 = Z

M - 5 = H

E - 5 = Z

N - 5 = I

T - 5 = O

Hence, the correct option is  DHKMJQZHZIO