Coding and Decoding questions:

1) In a certain code ‘RATIONAL’ is written as ‘TARNOILA’. How would ‘BRUTAL’ be written in that code?

a. UBRTAL

b. URBLAT

c. UBRATL

d. URBTAL

Answer:B. URBLAT

Explanation: Letters are reversed in groups of 3 which can be shown as:
RAT = TAR, ION = NOI. etc. So for BRUTAL
BRU = URB
TAL = LAT
so code for BRUTAL = URBLAT

2) In a certain code ‘PURPOSE’ is written as ‘UPPRSOE’. How would ‘WATER’ be written in that code?

a. WATRE

b. AWTRE

c. AWETR

d. WEATR

Answer:c. AWETR

Explanation: Interchange the letter in the pair of two and keep the last letter as it is.
WA = AW
TE = ET
So code of WATER is AWETR.

3)In a certain code ‘FORGIVE’ is written as ‘DPPHGWC’. How would ‘REQUEST’ be written in that code?

a. PFOVCTR

b. TFOVCRU

c. POFCVUR

d. TOFCVUR

Answer:a. PFOVCTR

Explanation: The letters move –2, +1, alternately R-2=P, E+1=F, Q-2=O, U+1=V and so on. So code of REQUEST is PFOVCTR.

4)If CALM is written as HEOO , YEAR may be written as

a. DHDS

b. DTDH

c. DDHT

d. DIDT

Answer:d. DIDT

Explanation: Each letter moves +5, +4, +3, +2.
Therefore, ‘DIDT’ is a code for ‘YEAR’.

5)If CALM is written as XZON, YEAR may be written as

a. BVZI

b. BZVI

c. BVIZ

d. BVZJ

Answer:a. BVZI

Explanation: The concept of Reverse EJOTY is followed.
Or we can also say that sum of letter & its respective coded letter is 27.
Y+B=25+2=27, E+V=5+22=27, and so on.
Hence code for YEAR is ‘BVZI’.

6)If CALM is written as LKZB, YEAR may be written as

a. BQDX

b. QZNX

c. QZDX

d. QDBX

Answer:c. QZDX

Explanation: Letters are reversed and then move –1.
Reverse of YEAR is RAEY and subtract 1 from each letter.
Hence Code for YEAR is ‘QZDX’.

7)If CALM is written as AYJK, YEAR may be written as

a. WCYP

b. WCXP

c. CWXP

d. PWXY

Answer:a. WCYP

Explanation: Each letter moves –2.
Y-2=W, E-2=C and so on. therefore, code for YEAR is ‘WCYP’.

8)If CALM written as ZDIP, YEAR may be written as

a. ZXHV

b. HVXZ

c. VHXU

d. VHWZ

Answer:c. VHXU

Explanation: The letters move –3, +3, alternately
Y-3=V, E+3=H and so on.
Hence code for YEAR is ‘VHXU’.

9) In a certain code ‘EASIER’ is written as TGKUCG. How is CUTTER written in that code?

a. TWVVGE

b. TGWWVE

c. TGVVWE

d. TVGVWE

Answer:c. TGVVWE

Explanation: : Letters are written in reverse and move +2. Reverse of CUTTER is RETTUC. Now add 2 to each letter
R+2=T, E+2=G, T+2=V and so on. So code of CUTTER is TGVVWE.

10) If ‘MEANDER’ is coded as ‘4515459’, then ‘MATHEMATICS’ is coded as

a. 6 7 2 5 0 6 2 3 0 7 6

b. 4 1 2 8 5 4 1 2 9 3 1

c. 4 5 0 3 8 4 0 1 8 5 4

d. 5 7 1 5 9 4 1 3 9 5 5

Answer:b. 4 1 2 8 5 4 1 2 9 3 1

Explanation: : Letters are arranged according to the digital sum roots which is explained by Example:
A = 1, B = 2, ..... ,H=8, I = 9, J = 10=1+0=1,M= 13= 1+3=4 & so on.
Similarly, code for MATHEMATICS is 4 1 2 8 5 4 1 2 9 3 1.

Exercise  Exercise 1 
 Exercise 2 
 Exercise 3 
 Exercise 4 
 Exercise 5 
 Exercise 6 
 Exercise 7 
 Exercise 8 
 Exercise 9 

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