Coding-Decoding Questions and Answers

Answer: C

The answer is Intelligent.

The colour of ocean water is actually blue. In this code language, 'blue' is called 'intelligent', so the answer in the code is intelligent.

'Blue' is the real colour but not the coded word. 'Moon' is the code for sky, and 'bright' is the code for intelligent, which is one step too far along the chain.

Answer: B

BRIGHT is coded as 64.

The code is the sum of the letters' positions in the alphabet. EXCELLENT checks out:

\[ \begin{aligned} E{+}X{+}C{+}E{+}L &= 5{+}24{+}3{+}5{+}12 \\ {+}L{+}E{+}N{+}T &= 12{+}5{+}14{+}20 \\ \text{total} &= 100 \end{aligned} \]

\[ B{+}R{+}I{+}G{+}H{+}T = 2{+}18{+}9{+}7{+}8{+}20 = 64 \]

90, 84 and 62 do not match this sum.

Answer: C

SIMILARLY is coded as ISIMRAYLL.

Compare STRUCTURE with TSURUTERC. The first four letters are swapped in pairs: ST → TS and RU → UR. The last five letters C T U R E become U T E R C: the third, second, fifth, fourth and first of those five.

Apply the same steps to SIMILARLY. SI → IS and MI → IM; the last five letters L A R L Y become R A Y L L. Together: ISIM RAYLL. Options A and B scramble the letters in other ways, so 'None of these' is also wrong.

Answer: B

258 is coded as 157.

The code is made of two parts written side by side: the sum of all three digits, followed by the sum of the first two digits.

For 258, the digits add to 2 + 5 + 8 = 15 and the first two add to 2 + 5 = 7, giving 157. The other options do not fit the rule that produced all three given codes.

Answer: D

The code for SECTION is PQKVEGU.

The rule is: write the word backwards, then move every letter two places forward in the alphabet.

CLASS reversed is SSALC, and shifting each letter by +2 gives S→U, S→U, A→C, L→N, C→E, which is UUCNE, as given.

SECTION reversed is NOITCES. Shifting each letter by +2 gives N→P, O→Q, I→K, T→V, C→E, E→G, S→U, which is PQKVEGU.

The distractors differ only in letter order or in one letter: PQKVGEU swaps E and G, and PQLVEGU shifts I by three places instead of two.

Answer: C

TRACK is written as 48135.

Each letter of RACKET has its own digit, in order: R = 8, A = 1, C = 3, K = 5, E = 2, T = 4.

TRACK uses only these letters: T = 4, R = 8, A = 1, C = 3, K = 5, giving 48135.

24813 starts with E's digit 2, 35418 and 54312 start with C's and K's digits, so none of them matches T R A C K letter by letter.

Answer: D

The value is αφσα.

Match the digits to the letters in order: 8 = α, 1 = β, 3 = γ, 5 = δ, 6 = π, 7 = θ, 2 = φ, 4 = Ψ, 9 = ρ, 0 = σ.

So γρθσ = 3970 and Ψφγα = 4238, and 3970 + 4238 = 8208. Converting back, 8 = α, 2 = φ, 0 = σ, 8 = α, giving αφσα.

αφθα would be 8278, and πρσα and πσρα would be 6908 and 6098, none of which is the sum.

In coding questions of this kind, always rebuild the full table first; working directly with the letters makes it easy to mis-assign a digit such as 0 or 9.

Answer: B

Correct answer: CPNCBZ

Each letter advances one place: MADRAS becomes NBESBT. BOMBAY therefore gives B→C, O→P, M→N, B→C, A→B, Y→Z, the Y wrapping round to Z. Since B appears twice in BOMBAY, C must appear twice in the code, which is true of every option here - the final letter is what separates them.

Answer: B

The alphabets are soded as shown :

N is coded as 2,
E as 1,
A as 7,
T as 3   and
S as 9.
So, NEATNESS is coded as 21732199.

Answer: B

Explanation:

Clearly,

T -1 = S
A -1 = Z
P -1 = O

So FREEZE will be,

F -1 E
R -1 Q
E -1 D
E -1 D
Z -1 Y
E -1 D